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/loops/matrix_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:24:23,180 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:24:23,184 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:24:23,197 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:24:23,198 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:24:23,199 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:24:23,201 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:24:23,206 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:24:23,210 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:24:23,211 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:24:23,212 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:24:23,212 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:24:23,213 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:24:23,219 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:24:23,221 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:24:23,221 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:24:23,225 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:24:23,226 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:24:23,230 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:24:23,231 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:24:23,235 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:24:23,236 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:24:23,242 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:24:23,245 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:24:23,245 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:24:23,246 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:24:23,248 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:24:23,249 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:24:23,249 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:24:23,253 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:24:23,253 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:24:23,254 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 12:24:23,254 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 12:24:23,254 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 12:24:23,255 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 12:24:23,256 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 12:24:23,256 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 [2018-10-24 12:24:23,288 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:24:23,288 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:24:23,292 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:24:23,293 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:24:23,293 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:24:23,293 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:24:23,293 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:24:23,294 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:24:23,294 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:24:23,294 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:24:23,294 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:24:23,295 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:24:23,295 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:24:23,295 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:24:23,296 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:24:23,296 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:24:23,296 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:24:23,296 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:24:23,297 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:24:23,298 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:24:23,299 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:24:23,299 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:24:23,299 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:24:23,299 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:24:23,299 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:24:23,300 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:24:23,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:24:23,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:24:23,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:24:23,302 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:24:23,302 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:24:23,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:24:23,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:24:23,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:24:23,376 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:24:23,377 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:24:23,378 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/matrix_true-unreach-call_true-termination.i [2018-10-24 12:24:23,448 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/880d0595b/bd66f162ac934d8da32330db5ea7291e/FLAGd9ddeee7a [2018-10-24 12:24:23,957 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:24:23,957 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix_true-unreach-call_true-termination.i [2018-10-24 12:24:23,963 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/880d0595b/bd66f162ac934d8da32330db5ea7291e/FLAGd9ddeee7a [2018-10-24 12:24:23,978 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/880d0595b/bd66f162ac934d8da32330db5ea7291e [2018-10-24 12:24:23,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:24:23,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:24:23,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:24:23,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:24:23,996 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:24:23,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:24,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337e39a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23, skipping insertion in model container [2018-10-24 12:24:24,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:24,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:24:24,030 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:24:24,210 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:24:24,215 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:24:24,239 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:24:24,262 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:24:24,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24 WrapperNode [2018-10-24 12:24:24,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:24:24,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:24:24,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:24:24,264 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:24:24,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:24:24,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:24:24,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:24:24,309 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:24:24,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (1/1) ... [2018-10-24 12:24:24,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:24:24,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:24:24,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:24:24,338 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:24:24,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (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 12:24:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:24:24,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:24:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:24:24,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:24:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:24:24,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:24:24,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:24:24,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:24:24,899 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:24:24,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:24 BoogieIcfgContainer [2018-10-24 12:24:24,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:24:24,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:24:24,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:24:24,905 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:24:24,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:24:23" (1/3) ... [2018-10-24 12:24:24,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d820d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:24, skipping insertion in model container [2018-10-24 12:24:24,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:24" (2/3) ... [2018-10-24 12:24:24,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d820d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:24, skipping insertion in model container [2018-10-24 12:24:24,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:24" (3/3) ... [2018-10-24 12:24:24,908 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix_true-unreach-call_true-termination.i [2018-10-24 12:24:24,919 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:24:24,927 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:24:24,945 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:24:24,980 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:24:24,980 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:24:24,980 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:24:24,980 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:24:24,980 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:24:24,981 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:24:24,981 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:24:24,981 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:24:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-10-24 12:24:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 12:24:25,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:25,008 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:25,010 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:25,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1518561956, now seen corresponding path program 1 times [2018-10-24 12:24:25,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:25,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,069 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:25,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:25,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:25,104 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:25,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,117 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,180 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-24 12:24:25,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:25,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:25,182 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 [2018-10-24 12:24:25,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,194 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:25,268 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 12:24:25,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:25,316 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 12:24:25,338 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:25,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2018-10-24 12:24:25,339 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:25,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:24:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:24:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:24:25,363 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2018-10-24 12:24:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:25,389 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2018-10-24 12:24:25,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:24:25,391 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-24 12:24:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:25,405 INFO L225 Difference]: With dead ends: 46 [2018-10-24 12:24:25,406 INFO L226 Difference]: Without dead ends: 19 [2018-10-24 12:24:25,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:24:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-24 12:24:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-24 12:24:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-24 12:24:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-24 12:24:25,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2018-10-24 12:24:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:25,453 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-24 12:24:25,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:24:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-24 12:24:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 12:24:25,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:25,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:25,455 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:25,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:25,456 INFO L82 PathProgramCache]: Analyzing trace with hash 876523911, now seen corresponding path program 1 times [2018-10-24 12:24:25,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:25,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,458 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:25,466 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:25,467 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:25,467 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:25,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,478 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,530 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-24 12:24:25,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:25,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:25,531 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:25,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,540 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:25,600 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 12:24:25,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:25,749 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 12:24:25,784 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:25,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-10-24 12:24:25,785 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:25,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:24:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:24:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 12:24:25,790 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2018-10-24 12:24:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:25,882 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-24 12:24:25,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:24:25,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-24 12:24:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:25,884 INFO L225 Difference]: With dead ends: 32 [2018-10-24 12:24:25,884 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 12:24:25,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 12:24:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 12:24:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2018-10-24 12:24:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:24:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-24 12:24:25,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2018-10-24 12:24:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:25,892 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-24 12:24:25,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:24:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-24 12:24:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-24 12:24:25,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:25,893 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:25,894 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:25,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash 69324171, now seen corresponding path program 1 times [2018-10-24 12:24:25,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:25,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,896 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:25,903 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:25,904 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:25,904 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:25,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,918 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,985 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-10-24 12:24:25,988 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [21], [34], [38], [42], [45], [47], [53], [54], [55], [57] [2018-10-24 12:24:26,022 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:26,023 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:26,246 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:24:26,248 INFO L272 AbstractInterpreter]: Visited 11 different actions 11 times. Never merged. Never widened. Never found a fixpoint. Largest state had 29 variables. [2018-10-24 12:24:26,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:26,301 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:24:26,423 INFO L232 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 75.77% of their original sizes. [2018-10-24 12:24:26,423 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:24:26,517 INFO L413 sIntCurrentIteration]: We have 17 unified AI predicates [2018-10-24 12:24:26,517 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:24:26,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:26,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:24:26,519 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:26,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:24:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:24:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:24:26,520 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-10-24 12:24:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:26,978 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-24 12:24:26,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:24:26,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-10-24 12:24:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:26,979 INFO L225 Difference]: With dead ends: 43 [2018-10-24 12:24:26,980 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 12:24:26,980 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:24:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 12:24:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2018-10-24 12:24:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-24 12:24:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-24 12:24:26,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-10-24 12:24:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:26,986 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-24 12:24:26,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:24:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-24 12:24:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 12:24:26,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:26,988 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:26,988 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:26,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1276771180, now seen corresponding path program 1 times [2018-10-24 12:24:26,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:26,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:26,990 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:27,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:27,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:27,001 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:27,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:27,013 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:27,075 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-24 12:24:27,076 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [21], [23], [26], [30], [34], [38], [42], [45], [47], [53], [54], [55], [57] [2018-10-24 12:24:27,082 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:27,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:27,211 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:27,211 INFO L272 AbstractInterpreter]: Visited 20 different actions 26 times. Merged at 4 different actions 4 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 38 variables. [2018-10-24 12:24:27,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:27,229 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:27,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:27,229 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:27,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:27,239 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:27,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:27,482 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2018-10-24 12:24:27,486 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2018-10-24 12:24:27,487 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,496 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,514 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:10 [2018-10-24 12:24:27,585 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-24 12:24:27,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2018-10-24 12:24:27,598 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,600 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:27,601 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-10-24 12:24:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:27,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:27,840 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2018-10-24 12:24:28,070 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-10-24 12:24:28,085 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-10-24 12:24:28,086 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:28,112 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:28,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:24:28,139 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:19 [2018-10-24 12:24:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:28,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:24:28,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-10-24 12:24:28,297 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:28,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:24:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:24:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:24:28,300 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2018-10-24 12:24:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:29,026 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2018-10-24 12:24:29,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 12:24:29,027 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-10-24 12:24:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:29,029 INFO L225 Difference]: With dead ends: 67 [2018-10-24 12:24:29,030 INFO L226 Difference]: Without dead ends: 61 [2018-10-24 12:24:29,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-10-24 12:24:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-24 12:24:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2018-10-24 12:24:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 12:24:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2018-10-24 12:24:29,045 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 22 [2018-10-24 12:24:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:29,046 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2018-10-24 12:24:29,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:24:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2018-10-24 12:24:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 12:24:29,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:29,048 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:29,048 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:29,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1018605742, now seen corresponding path program 1 times [2018-10-24 12:24:29,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:29,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:29,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:29,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:29,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:29,056 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:29,056 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:29,057 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:29,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:29,075 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:29,111 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-24 12:24:29,111 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [21], [23], [28], [30], [34], [38], [42], [45], [47], [53], [54], [55], [57] [2018-10-24 12:24:29,115 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:29,121 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:29,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:29,193 INFO L272 AbstractInterpreter]: Visited 20 different actions 26 times. Merged at 4 different actions 4 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 37 variables. [2018-10-24 12:24:29,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:29,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:29,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:29,214 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:29,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:29,224 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:29,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:29,345 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-24 12:24:29,360 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-24 12:24:29,361 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,386 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,426 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:22, output treesize:11 [2018-10-24 12:24:29,476 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-24 12:24:29,479 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-10-24 12:24:29,480 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,482 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,483 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,483 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2018-10-24 12:24:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:29,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:29,640 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2018-10-24 12:24:29,679 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-10-24 12:24:29,680 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,682 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:29,693 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:19 [2018-10-24 12:24:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:29,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:24:29,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-10-24 12:24:29,874 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:29,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 12:24:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 12:24:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:24:29,875 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 16 states. [2018-10-24 12:24:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:30,935 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2018-10-24 12:24:30,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 12:24:30,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-10-24 12:24:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:30,942 INFO L225 Difference]: With dead ends: 87 [2018-10-24 12:24:30,943 INFO L226 Difference]: Without dead ends: 79 [2018-10-24 12:24:30,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:24:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-24 12:24:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 39. [2018-10-24 12:24:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-24 12:24:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-10-24 12:24:30,956 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2018-10-24 12:24:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:30,956 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-10-24 12:24:30,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 12:24:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-10-24 12:24:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 12:24:30,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:30,958 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:30,958 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:30,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1315940048, now seen corresponding path program 2 times [2018-10-24 12:24:30,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:30,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:30,960 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:30,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-24 12:24:30,968 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-24 12:24:30,968 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-24 12:24:30,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:30,989 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-24 12:24:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:31,031 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:31,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:31,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:31,031 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:31,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:24:31,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:24:31,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:24:31,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:24:31,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-24 12:24:31,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-24 12:24:31,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:24:31,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-24 12:24:31,196 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:31,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:24:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:24:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:24:31,197 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2018-10-24 12:24:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:31,268 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2018-10-24 12:24:31,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:24:31,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2018-10-24 12:24:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:31,272 INFO L225 Difference]: With dead ends: 39 [2018-10-24 12:24:31,272 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:24:31,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:24:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:24:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:24:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:24:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:24:31,273 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2018-10-24 12:24:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:31,274 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:24:31,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:24:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:24:31,274 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:24:31,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:24:31,535 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:24:31,536 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:24:31,536 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:24:31,536 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:24:31,536 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:24:31,537 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:24:31,537 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:24:31,537 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 31) no Hoare annotation was computed. [2018-10-24 12:24:31,537 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 26) no Hoare annotation was computed. [2018-10-24 12:24:31,537 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 26) no Hoare annotation was computed. [2018-10-24 12:24:31,537 INFO L421 ceAbstractionStarter]: At program point L19-4(lines 19 26) the Hoare annotation is: (or (and (< (select (select |#memory_int| |main_~#matriz~0.base|) |main_~#matriz~0.offset|) (+ main_~maior~0 1)) (= 1 main_~N_COL~0) (= main_~j~0 1)) (and (not (= |main_~#matriz~0.base| 0)) (= main_~j~0 0) (= 1 main_~N_LIN~0) (= 0 |main_~#matriz~0.offset|) (= main_~N_COL~0 1))) [2018-10-24 12:24:31,538 INFO L425 ceAbstractionStarter]: For program point L19-5(lines 19 26) no Hoare annotation was computed. [2018-10-24 12:24:31,538 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 31) no Hoare annotation was computed. [2018-10-24 12:24:31,538 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 31) the Hoare annotation is: true [2018-10-24 12:24:31,538 INFO L421 ceAbstractionStarter]: At program point L28(line 28) the Hoare annotation is: (and (<= |main_#t~mem6| main_~maior~0) (<= (select (select |#memory_int| |main_~#matriz~0.base|) |main_~#matriz~0.offset|) main_~maior~0) (or (forall ((|main_~#matriz~0.offset| Int)) (= (+ 0 (+ (* (* 4 (mod main_~N_LIN~0 4294967296)) (mod main_~j~0 4294967296)) |main_~#matriz~0.offset|)) |main_~#matriz~0.offset|)) (<= (mod main_~N_COL~0 4294967296) (mod main_~j~0 4294967296)))) [2018-10-24 12:24:31,538 INFO L425 ceAbstractionStarter]: For program point L28-1(line 28) no Hoare annotation was computed. [2018-10-24 12:24:31,538 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 25) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 26) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point L20-3(lines 20 26) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L421 ceAbstractionStarter]: At program point L20-4(lines 20 26) the Hoare annotation is: (let ((.cse0 (= main_~j~0 0)) (.cse1 (= 1 main_~N_LIN~0)) (.cse2 (= 0 |main_~#matriz~0.offset|))) (or (and (= 1 main_~N_COL~0) .cse0 (< (select (select |#memory_int| |main_~#matriz~0.base|) |main_~#matriz~0.offset|) (+ main_~maior~0 1)) .cse1 .cse2) (and (not (= |main_~#matriz~0.base| 0)) (= main_~k~0 0) .cse0 .cse1 .cse2 (= main_~N_COL~0 1)))) [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:24:31,539 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:24:31,540 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:24:31,546 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,549 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,551 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,552 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:24:31 BoogieIcfgContainer [2018-10-24 12:24:31,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:24:31,556 INFO L168 Benchmark]: Toolchain (without parser) took 7565.91 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -294.7 MB). Peak memory consumption was 433.0 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:31,557 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:24:31,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.89 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:31,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:24:31,559 INFO L168 Benchmark]: Boogie Preprocessor took 28.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:24:31,559 INFO L168 Benchmark]: RCFGBuilder took 563.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -776.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:31,560 INFO L168 Benchmark]: TraceAbstraction took 6653.89 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 471.1 MB). Peak memory consumption was 471.1 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:31,564 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.89 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 563.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -776.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6653.89 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 471.1 MB). Peak memory consumption was 471.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant [2018-10-24 12:24:31,573 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,578 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((unknown-#memory_int-unknown[matriz][matriz] < maior + 1 && 1 == N_COL) && j == 1) || ((((!(matriz == 0) && j == 0) && 1 == N_LIN) && 0 == matriz) && N_COL == 1) - InvariantResult [Line: 20]: Loop Invariant [2018-10-24 12:24:31,579 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:24:31,580 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((1 == N_COL && j == 0) && unknown-#memory_int-unknown[matriz][matriz] < maior + 1) && 1 == N_LIN) && 0 == matriz) || (((((!(matriz == 0) && k == 0) && j == 0) && 1 == N_LIN) && 0 == matriz) && N_COL == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 6.5s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 104 SDtfs, 102 SDslu, 298 SDs, 0 SdLazy, 373 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 247 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 3 AbstIntIterations, 1 AbstIntStrong, 0.8186274509803921 AbsIntWeakeningRatio, 1.3529411764705883 AbsIntAvgWeakeningVarsNumRemoved, 2.9411764705882355 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 66 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 117 HoareAnnotationTreeSize, 14 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 289 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 226 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 198 ConstructedInterpolants, 4 QuantifiedInterpolants, 21691 SizeOfPredicates, 48 NumberOfNonLiveVariables, 497 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 62/82 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...