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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:09:27,106 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:09:27,108 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:09:27,120 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:09:27,121 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:09:27,122 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:09:27,123 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:09:27,125 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:09:27,129 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:09:27,130 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:09:27,134 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:09:27,134 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:09:27,135 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:09:27,138 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:09:27,139 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:09:27,142 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:09:27,144 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:09:27,148 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:09:27,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:09:27,152 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:09:27,153 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:09:27,157 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:09:27,160 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 18:09:27,161 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 18:09:27,163 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 18:09:27,164 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 18:09:27,165 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 18:09:27,165 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 18:09:27,166 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 18:09:27,172 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 18:09:27,172 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 18:09:27,173 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 18:09:27,173 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:09:27,173 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:09:27,174 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:09:27,175 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:09:27,175 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:09:27,206 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:09:27,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:09:27,208 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:09:27,208 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:09:27,208 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:09:27,209 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:09:27,209 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:09:27,209 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:09:27,209 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:09:27,209 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:09:27,210 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:09:27,210 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:09:27,211 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:09:27,211 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:09:27,211 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:09:27,212 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:09:27,212 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:09:27,212 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:09:27,212 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:09:27,212 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:09:27,214 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:09:27,215 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:09:27,215 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:09:27,215 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:09:27,215 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:09:27,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:09:27,216 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:09:27,216 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:09:27,216 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:09:27,216 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:09:27,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:09:27,217 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:09:27,217 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:09:27,217 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:09:27,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:09:27,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:09:27,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:09:27,295 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:09:27,295 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:09:27,296 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-24 18:09:27,362 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/068aab27b/625c716208b342b98fdc852d36ec716d/FLAG156cae085 [2018-10-24 18:09:27,912 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:09:27,915 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-24 18:09:27,936 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/068aab27b/625c716208b342b98fdc852d36ec716d/FLAG156cae085 [2018-10-24 18:09:27,952 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/068aab27b/625c716208b342b98fdc852d36ec716d [2018-10-24 18:09:27,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:09:27,964 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:09:27,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:09:27,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:09:27,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:09:27,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:09:27" (1/1) ... [2018-10-24 18:09:27,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128929bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:27, skipping insertion in model container [2018-10-24 18:09:27,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:09:27" (1/1) ... [2018-10-24 18:09:27,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:09:28,052 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:09:28,779 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:09:28,784 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:09:28,977 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:09:28,996 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:09:28,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28 WrapperNode [2018-10-24 18:09:28,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:09:28,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:09:28,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:09:28,998 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:09:29,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:09:29,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:09:29,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:09:29,288 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:09:29,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (1/1) ... [2018-10-24 18:09:29,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:09:29,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:09:29,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:09:29,428 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:09:29,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (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 [2018-10-24 18:09:29,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:09:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:09:29,501 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:09:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:09:29,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:09:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:09:29,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:09:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:09:34,202 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:09:34,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:09:34 BoogieIcfgContainer [2018-10-24 18:09:34,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:09:34,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:09:34,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:09:34,208 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:09:34,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:09:27" (1/3) ... [2018-10-24 18:09:34,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d932586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:09:34, skipping insertion in model container [2018-10-24 18:09:34,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:09:28" (2/3) ... [2018-10-24 18:09:34,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d932586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:09:34, skipping insertion in model container [2018-10-24 18:09:34,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:09:34" (3/3) ... [2018-10-24 18:09:34,213 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label00_false-unreach-call.c [2018-10-24 18:09:34,224 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:09:34,234 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:09:34,253 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:09:34,295 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:09:34,295 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:09:34,295 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:09:34,295 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:09:34,296 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:09:34,296 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:09:34,296 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:09:34,296 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:09:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-10-24 18:09:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 18:09:34,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:34,333 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:09:34,336 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:34,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash 321624169, now seen corresponding path program 1 times [2018-10-24 18:09:34,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:34,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:34,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:34,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:34,410 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:34,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:34,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:09:34,622 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:34,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:09:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:09:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:34,649 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-10-24 18:09:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:37,264 INFO L93 Difference]: Finished difference Result 783 states and 1371 transitions. [2018-10-24 18:09:37,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:09:37,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-24 18:09:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:37,298 INFO L225 Difference]: With dead ends: 783 [2018-10-24 18:09:37,298 INFO L226 Difference]: Without dead ends: 488 [2018-10-24 18:09:37,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-10-24 18:09:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2018-10-24 18:09:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-10-24 18:09:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 737 transitions. [2018-10-24 18:09:37,430 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 737 transitions. Word has length 13 [2018-10-24 18:09:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:37,431 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 737 transitions. [2018-10-24 18:09:37,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:09:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 737 transitions. [2018-10-24 18:09:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 18:09:37,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:37,438 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:09:37,438 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:37,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1144152091, now seen corresponding path program 1 times [2018-10-24 18:09:37,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:37,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:37,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:37,903 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:09:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:38,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:38,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:09:38,222 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:38,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:09:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:09:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:09:38,225 INFO L87 Difference]: Start difference. First operand 488 states and 737 transitions. Second operand 6 states. [2018-10-24 18:09:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:43,234 INFO L93 Difference]: Finished difference Result 1564 states and 2506 transitions. [2018-10-24 18:09:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:09:43,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2018-10-24 18:09:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:43,245 INFO L225 Difference]: With dead ends: 1564 [2018-10-24 18:09:43,245 INFO L226 Difference]: Without dead ends: 1082 [2018-10-24 18:09:43,248 INFO L605 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 [2018-10-24 18:09:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2018-10-24 18:09:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1070. [2018-10-24 18:09:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2018-10-24 18:09:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1603 transitions. [2018-10-24 18:09:43,309 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1603 transitions. Word has length 86 [2018-10-24 18:09:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:43,310 INFO L481 AbstractCegarLoop]: Abstraction has 1070 states and 1603 transitions. [2018-10-24 18:09:43,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:09:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1603 transitions. [2018-10-24 18:09:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 18:09:43,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:43,317 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:43,317 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:43,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash 919002884, now seen corresponding path program 1 times [2018-10-24 18:09:43,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:43,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:43,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:43,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:43,320 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:43,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:43,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:09:43,460 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:43,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:09:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:09:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:43,461 INFO L87 Difference]: Start difference. First operand 1070 states and 1603 transitions. Second operand 3 states. [2018-10-24 18:09:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:45,800 INFO L93 Difference]: Finished difference Result 2535 states and 3860 transitions. [2018-10-24 18:09:45,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:09:45,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2018-10-24 18:09:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:45,813 INFO L225 Difference]: With dead ends: 2535 [2018-10-24 18:09:45,814 INFO L226 Difference]: Without dead ends: 1471 [2018-10-24 18:09:45,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2018-10-24 18:09:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1461. [2018-10-24 18:09:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2018-10-24 18:09:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2109 transitions. [2018-10-24 18:09:45,890 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2109 transitions. Word has length 87 [2018-10-24 18:09:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:45,892 INFO L481 AbstractCegarLoop]: Abstraction has 1461 states and 2109 transitions. [2018-10-24 18:09:45,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:09:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2109 transitions. [2018-10-24 18:09:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 18:09:45,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:45,897 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:45,897 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:45,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:45,898 INFO L82 PathProgramCache]: Analyzing trace with hash -363526081, now seen corresponding path program 1 times [2018-10-24 18:09:45,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:45,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:45,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:45,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:45,899 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:46,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:46,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:09:46,078 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:46,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:09:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:09:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:46,080 INFO L87 Difference]: Start difference. First operand 1461 states and 2109 transitions. Second operand 3 states. [2018-10-24 18:09:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:47,661 INFO L93 Difference]: Finished difference Result 3308 states and 4868 transitions. [2018-10-24 18:09:47,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:09:47,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2018-10-24 18:09:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:47,683 INFO L225 Difference]: With dead ends: 3308 [2018-10-24 18:09:47,683 INFO L226 Difference]: Without dead ends: 1853 [2018-10-24 18:09:47,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:09:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2018-10-24 18:09:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1847. [2018-10-24 18:09:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1847 states. [2018-10-24 18:09:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2612 transitions. [2018-10-24 18:09:47,748 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2612 transitions. Word has length 88 [2018-10-24 18:09:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:47,749 INFO L481 AbstractCegarLoop]: Abstraction has 1847 states and 2612 transitions. [2018-10-24 18:09:47,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:09:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2612 transitions. [2018-10-24 18:09:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-24 18:09:47,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:47,754 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:47,754 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:47,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1267945301, now seen corresponding path program 1 times [2018-10-24 18:09:47,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:47,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:47,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:47,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:47,759 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:47,969 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:47,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:09:47,969 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:47,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:09:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:09:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:09:47,971 INFO L87 Difference]: Start difference. First operand 1847 states and 2612 transitions. Second operand 6 states. [2018-10-24 18:09:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:52,966 INFO L93 Difference]: Finished difference Result 6013 states and 8876 transitions. [2018-10-24 18:09:52,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:09:52,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2018-10-24 18:09:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:52,999 INFO L225 Difference]: With dead ends: 6013 [2018-10-24 18:09:52,999 INFO L226 Difference]: Without dead ends: 4172 [2018-10-24 18:09:53,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 18:09:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2018-10-24 18:09:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4107. [2018-10-24 18:09:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4107 states. [2018-10-24 18:09:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 5492 transitions. [2018-10-24 18:09:53,127 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 5492 transitions. Word has length 94 [2018-10-24 18:09:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:53,127 INFO L481 AbstractCegarLoop]: Abstraction has 4107 states and 5492 transitions. [2018-10-24 18:09:53,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:09:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 5492 transitions. [2018-10-24 18:09:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-24 18:09:53,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:53,129 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:53,134 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:53,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:53,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1445719641, now seen corresponding path program 1 times [2018-10-24 18:09:53,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:53,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:53,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:53,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:53,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:53,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:09:53,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 18:09:53,755 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:09:53,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 18:09:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 18:09:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 18:09:53,756 INFO L87 Difference]: Start difference. First operand 4107 states and 5492 transitions. Second operand 7 states. [2018-10-24 18:09:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:09:58,002 INFO L93 Difference]: Finished difference Result 9565 states and 13475 transitions. [2018-10-24 18:09:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 18:09:58,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2018-10-24 18:09:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:09:58,043 INFO L225 Difference]: With dead ends: 9565 [2018-10-24 18:09:58,044 INFO L226 Difference]: Without dead ends: 5269 [2018-10-24 18:09:58,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 18:09:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2018-10-24 18:09:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 4935. [2018-10-24 18:09:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4935 states. [2018-10-24 18:09:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 6612 transitions. [2018-10-24 18:09:58,204 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 6612 transitions. Word has length 108 [2018-10-24 18:09:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:09:58,204 INFO L481 AbstractCegarLoop]: Abstraction has 4935 states and 6612 transitions. [2018-10-24 18:09:58,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 18:09:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 6612 transitions. [2018-10-24 18:09:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-24 18:09:58,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:09:58,208 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:09:58,209 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:09:58,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:09:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1076492435, now seen corresponding path program 1 times [2018-10-24 18:09:58,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:09:58,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:58,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:09:58,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:09:58,211 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:09:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:09:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:09:58,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:09:58,485 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:09:58,486 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2018-10-24 18:09:58,489 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-24 18:09:58,589 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:09:58,589 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:10:03,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:10:21,414 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 18:10:21,415 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-24 18:10:21,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:10:21,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 18:10:21,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:10:21,429 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 [2018-10-24 18:10:21,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:10:21,439 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 18:10:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:10:21,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 18:10:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:10:21,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 18:10:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:10:21,894 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:10:21,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-10-24 18:10:21,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:10:21,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:10:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:10:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-24 18:10:21,896 INFO L87 Difference]: Start difference. First operand 4935 states and 6612 transitions. Second operand 3 states. [2018-10-24 18:10:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:10:24,624 INFO L93 Difference]: Finished difference Result 10820 states and 14905 transitions. [2018-10-24 18:10:24,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:10:24,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2018-10-24 18:10:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:10:24,651 INFO L225 Difference]: With dead ends: 10820 [2018-10-24 18:10:24,651 INFO L226 Difference]: Without dead ends: 5891 [2018-10-24 18:10:24,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-24 18:10:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2018-10-24 18:10:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 5679. [2018-10-24 18:10:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5679 states. [2018-10-24 18:10:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 7518 transitions. [2018-10-24 18:10:24,827 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 7518 transitions. Word has length 145 [2018-10-24 18:10:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:10:24,828 INFO L481 AbstractCegarLoop]: Abstraction has 5679 states and 7518 transitions. [2018-10-24 18:10:24,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:10:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 7518 transitions. [2018-10-24 18:10:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-24 18:10:24,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:10:24,833 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:10:24,833 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:10:24,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:10:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1768948367, now seen corresponding path program 1 times [2018-10-24 18:10:24,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:10:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:10:24,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:10:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:10:24,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:10:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:10:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:10:25,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:10:25,266 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:10:25,266 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-10-24 18:10:25,267 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-24 18:10:25,276 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:10:25,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:10:27,317 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:10:43,752 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:10:43,753 INFO L272 AbstractInterpreter]: Visited 125 different actions 362 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-24 18:10:43,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:10:43,794 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:10:48,540 INFO L232 lantSequenceWeakener]: Weakened 223 states. On average, predicates are now at 73.03% of their original sizes. [2018-10-24 18:10:48,541 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:10:50,085 INFO L413 sIntCurrentIteration]: We have 224 unified AI predicates [2018-10-24 18:10:50,085 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:10:50,086 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:10:50,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2018-10-24 18:10:50,086 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:10:50,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 18:10:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 18:10:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-24 18:10:50,088 INFO L87 Difference]: Start difference. First operand 5679 states and 7518 transitions. Second operand 12 states. [2018-10-24 18:11:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:11:34,323 INFO L93 Difference]: Finished difference Result 11737 states and 15483 transitions. [2018-10-24 18:11:34,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 18:11:34,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 225 [2018-10-24 18:11:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:11:34,351 INFO L225 Difference]: With dead ends: 11737 [2018-10-24 18:11:34,352 INFO L226 Difference]: Without dead ends: 6064 [2018-10-24 18:11:34,373 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2018-10-24 18:11:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2018-10-24 18:11:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 6060. [2018-10-24 18:11:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6060 states. [2018-10-24 18:11:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 7932 transitions. [2018-10-24 18:11:34,509 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 7932 transitions. Word has length 225 [2018-10-24 18:11:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:11:34,509 INFO L481 AbstractCegarLoop]: Abstraction has 6060 states and 7932 transitions. [2018-10-24 18:11:34,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 18:11:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 7932 transitions. [2018-10-24 18:11:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 18:11:34,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:11:34,515 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:11:34,515 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:11:34,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:11:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1941363547, now seen corresponding path program 1 times [2018-10-24 18:11:34,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:11:34,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:11:34,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:11:34,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:11:34,517 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:11:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:11:34,998 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 18:11:35,591 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 18:11:35,865 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 18:11:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:11:35,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:11:35,975 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:11:35,976 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-10-24 18:11:35,976 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-24 18:11:35,986 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:11:35,986 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:11:37,833 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:11:54,442 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:11:54,443 INFO L272 AbstractInterpreter]: Visited 135 different actions 393 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-24 18:11:54,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:11:54,462 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:11:58,677 INFO L232 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 76.05% of their original sizes. [2018-10-24 18:11:58,677 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:12:35,226 INFO L413 sIntCurrentIteration]: We have 234 unified AI predicates [2018-10-24 18:12:35,227 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:12:35,227 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:12:35,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [10] total 26 [2018-10-24 18:12:35,227 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:12:35,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 18:12:35,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 18:12:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2018-10-24 18:12:35,229 INFO L87 Difference]: Start difference. First operand 6060 states and 7932 transitions. Second operand 18 states. Received shutdown request... [2018-10-24 18:13:11,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 18:13:11,033 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 18:13:11,038 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 18:13:11,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 06:13:11 BoogieIcfgContainer [2018-10-24 18:13:11,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 18:13:11,039 INFO L168 Benchmark]: Toolchain (without parser) took 223076.34 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 18:13:11,041 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. [2018-10-24 18:13:11,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1032.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:11,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 289.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:11,043 INFO L168 Benchmark]: Boogie Preprocessor took 140.04 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 18:13:11,043 INFO L168 Benchmark]: RCFGBuilder took 4776.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 184.7 MB). Peak memory consumption was 184.7 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:11,044 INFO L168 Benchmark]: TraceAbstraction took 216833.82 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -603.7 MB). Peak memory consumption was 945.0 MB. Max. memory is 7.1 GB. [2018-10-24 18:13:11,049 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 1032.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 289.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -831.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.04 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4776.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 184.7 MB). Peak memory consumption was 184.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216833.82 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -603.7 MB). Peak memory consumption was 945.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (6060states) and FLOYD_HOARE automaton (currently 9 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 216.7s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 103.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2257 SDtfs, 5527 SDslu, 1139 SDs, 0 SdLazy, 9942 SolverSat, 1635 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.9s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 816 GetRequests, 720 SyntacticMatches, 22 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 41.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6060occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 59.9s AbstIntTime, 3 AbstIntIterations, 2 AbstIntStrong, 0.9952808391673025 AbsIntWeakeningRatio, 0.1222707423580786 AbsIntAvgWeakeningVarsNumRemoved, 182.99126637554585 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 8 MinimizatonAttempts, 643 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1226 NumberOfCodeBlocks, 1226 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 1429287 SizeOfPredicates, 2 NumberOfNonLiveVariables, 310 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 74/262 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown