./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17744505b3a424a40a1b2449004fea58677c1b94 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:21:46,253 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:21:46,255 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:21:46,273 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:21:46,274 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:21:46,276 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:21:46,278 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:21:46,280 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:21:46,282 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:21:46,285 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:21:46,285 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:21:46,287 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:21:46,288 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:21:46,291 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:21:46,298 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:21:46,299 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:21:46,300 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:21:46,303 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:21:46,305 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:21:46,308 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:21:46,309 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:21:46,311 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:21:46,314 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:21:46,314 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:21:46,314 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:21:46,317 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:21:46,318 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:21:46,319 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:21:46,323 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:21:46,324 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:21:46,326 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:21:46,327 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:21:46,327 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:21:46,327 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:21:46,329 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:21:46,330 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:21:46,330 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:21:46,355 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:21:46,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:21:46,356 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:21:46,356 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:21:46,360 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:21:46,360 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:21:46,360 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:21:46,360 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:21:46,360 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:21:46,361 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:21:46,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:21:46,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:21:46,363 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:21:46,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:21:46,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:21:46,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:21:46,363 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:21:46,365 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:21:46,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:21:46,365 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:21:46,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:21:46,366 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:21:46,366 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:21:46,366 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:21:46,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:21:46,366 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17744505b3a424a40a1b2449004fea58677c1b94 [2018-11-28 18:21:46,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:21:46,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:21:46,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:21:46,430 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:21:46,432 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:21:46,433 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-28 18:21:46,499 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0d9eb54/0a4dfc328dac42899b9e275e61b46863/FLAG86777770f [2018-11-28 18:21:46,909 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:21:46,909 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-28 18:21:46,916 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0d9eb54/0a4dfc328dac42899b9e275e61b46863/FLAG86777770f [2018-11-28 18:21:47,292 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0d9eb54/0a4dfc328dac42899b9e275e61b46863 [2018-11-28 18:21:47,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:21:47,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:21:47,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:21:47,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:21:47,302 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:21:47,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12fb19ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47, skipping insertion in model container [2018-11-28 18:21:47,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:21:47,334 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:21:47,541 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:21:47,549 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:21:47,575 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:21:47,596 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:21:47,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47 WrapperNode [2018-11-28 18:21:47,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:21:47,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:21:47,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:21:47,598 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:21:47,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:21:47,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:21:47,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:21:47,625 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:21:47,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... [2018-11-28 18:21:47,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:21:47,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:21:47,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:21:47,656 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:21:47,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:21:47,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:21:47,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:21:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:21:47,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:21:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:21:47,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:21:47,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 18:21:47,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 18:21:48,078 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:21:48,078 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-28 18:21:48,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:21:48 BoogieIcfgContainer [2018-11-28 18:21:48,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:21:48,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:21:48,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:21:48,083 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:21:48,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:21:47" (1/3) ... [2018-11-28 18:21:48,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e359e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:21:48, skipping insertion in model container [2018-11-28 18:21:48,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:21:47" (2/3) ... [2018-11-28 18:21:48,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e359e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:21:48, skipping insertion in model container [2018-11-28 18:21:48,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:21:48" (3/3) ... [2018-11-28 18:21:48,086 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-11-28 18:21:48,095 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:21:48,103 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:21:48,117 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:21:48,149 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:21:48,150 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:21:48,150 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:21:48,151 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:21:48,151 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:21:48,151 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:21:48,151 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:21:48,151 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:21:48,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:21:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-28 18:21:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-28 18:21:48,178 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:48,179 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:48,181 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:48,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2018-11-28 18:21:48,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:48,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:48,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:48,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:48,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:48,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:21:48,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 18:21:48,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 18:21:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 18:21:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 18:21:48,329 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-11-28 18:21:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:48,353 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2018-11-28 18:21:48,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 18:21:48,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-11-28 18:21:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:48,365 INFO L225 Difference]: With dead ends: 35 [2018-11-28 18:21:48,365 INFO L226 Difference]: Without dead ends: 15 [2018-11-28 18:21:48,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 18:21:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-28 18:21:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-28 18:21:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-28 18:21:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-11-28 18:21:48,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2018-11-28 18:21:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:48,404 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-11-28 18:21:48,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 18:21:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-11-28 18:21:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:21:48,405 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:48,405 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:48,406 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:48,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:48,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2018-11-28 18:21:48,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:48,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:48,896 WARN L180 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-11-28 18:21:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:48,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:21:48,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:21:48,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:21:48,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:21:48,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:21:48,930 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2018-11-28 18:21:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:49,001 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-28 18:21:49,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:21:49,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:21:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:49,003 INFO L225 Difference]: With dead ends: 23 [2018-11-28 18:21:49,003 INFO L226 Difference]: Without dead ends: 17 [2018-11-28 18:21:49,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:21:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-28 18:21:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-28 18:21:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-28 18:21:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-11-28 18:21:49,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-11-28 18:21:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:49,010 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-11-28 18:21:49,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:21:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-11-28 18:21:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 18:21:49,011 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:49,011 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:49,011 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:49,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2018-11-28 18:21:49,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:49,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:49,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:49,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:49,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:49,646 WARN L180 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-11-28 18:21:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:49,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:21:49,687 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:21:49,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:49,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:21:50,178 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-28 18:21:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:50,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:21:50,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-28 18:21:50,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:21:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:21:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:21:50,301 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2018-11-28 18:21:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:50,465 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-11-28 18:21:50,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:21:50,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-11-28 18:21:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:50,467 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:21:50,468 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 18:21:50,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:21:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 18:21:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-28 18:21:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-28 18:21:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2018-11-28 18:21:50,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2018-11-28 18:21:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:50,475 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-11-28 18:21:50,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:21:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2018-11-28 18:21:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 18:21:50,476 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:50,477 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:50,477 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:50,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -945074988, now seen corresponding path program 1 times [2018-11-28 18:21:50,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:50,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:50,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:21:50,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:21:50,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 18:21:50,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 18:21:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 18:21:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 18:21:50,538 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2018-11-28 18:21:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:50,553 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-28 18:21:50,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 18:21:50,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-11-28 18:21:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:50,557 INFO L225 Difference]: With dead ends: 31 [2018-11-28 18:21:50,557 INFO L226 Difference]: Without dead ends: 20 [2018-11-28 18:21:50,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 18:21:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-28 18:21:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-28 18:21:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-28 18:21:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-28 18:21:50,563 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2018-11-28 18:21:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:50,563 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-28 18:21:50,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 18:21:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-28 18:21:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 18:21:50,564 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:50,564 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:50,565 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:50,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1104392731, now seen corresponding path program 2 times [2018-11-28 18:21:50,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:50,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:50,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:50,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:50,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:50,822 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-28 18:21:51,432 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-11-28 18:21:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:51,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:21:51,460 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:21:51,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:21:51,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:21:51,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:21:51,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:21:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:21:51,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:21:51,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-28 18:21:51,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 18:21:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 18:21:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:21:51,744 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 16 states. [2018-11-28 18:21:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:52,109 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2018-11-28 18:21:52,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 18:21:52,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2018-11-28 18:21:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:52,111 INFO L225 Difference]: With dead ends: 51 [2018-11-28 18:21:52,112 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:21:52,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-11-28 18:21:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:21:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2018-11-28 18:21:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:21:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 18:21:52,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2018-11-28 18:21:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:52,120 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 18:21:52,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 18:21:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 18:21:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 18:21:52,121 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:21:52,121 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:21:52,122 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:21:52,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:21:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash -767923148, now seen corresponding path program 1 times [2018-11-28 18:21:52,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:21:52,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:21:52,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:52,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:21:52,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:21:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:52,668 WARN L180 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-11-28 18:21:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:21:52,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:21:52,689 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:21:52,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:21:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:21:52,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:21:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:21:52,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:21:52,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-28 18:21:52,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:21:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:21:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:21:52,811 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-11-28 18:21:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:21:52,856 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-11-28 18:21:52,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:21:52,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-11-28 18:21:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:21:52,858 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:21:52,858 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:21:52,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:21:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:21:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:21:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:21:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:21:52,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-11-28 18:21:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:21:52,861 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:21:52,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:21:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:21:52,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:21:52,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:21:52,923 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:21:52,923 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:21:52,923 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:21:52,924 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:21:52,924 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:21:52,924 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:21:52,924 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2018-11-28 18:21:52,924 INFO L448 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-11-28 18:21:52,924 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2018-11-28 18:21:52,924 INFO L448 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-11-28 18:21:52,925 INFO L448 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-11-28 18:21:52,925 INFO L448 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2018-11-28 18:21:52,925 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2018-11-28 18:21:52,925 INFO L444 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= main_~a~0 main_~b~0) (<= main_~b~0 main_~a~0)) [2018-11-28 18:21:52,925 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2018-11-28 18:21:52,925 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-11-28 18:21:52,925 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-28 18:21:52,927 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-28 18:21:52,927 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-28 18:21:52,927 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-28 18:21:52,928 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-28 18:21:52,928 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-28 18:21:52,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:21:52 BoogieIcfgContainer [2018-11-28 18:21:52,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:21:52,931 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:21:52,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:21:52,932 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:21:52,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:21:48" (3/4) ... [2018-11-28 18:21:52,936 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:21:52,942 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:21:52,942 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:21:52,942 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-28 18:21:52,947 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-28 18:21:52,947 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-28 18:21:52,948 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:21:52,948 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:21:53,000 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:21:53,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:21:53,004 INFO L168 Benchmark]: Toolchain (without parser) took 5708.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 952.7 MB in the beginning and 946.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 169.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:21:53,006 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:21:53,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.87 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:21:53,009 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:21:53,009 INFO L168 Benchmark]: Boogie Preprocessor took 30.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:21:53,010 INFO L168 Benchmark]: RCFGBuilder took 422.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:21:53,011 INFO L168 Benchmark]: TraceAbstraction took 4851.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.8 MB in the end (delta: 190.2 MB). Peak memory consumption was 190.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:21:53,012 INFO L168 Benchmark]: Witness Printer took 71.78 ms. Allocated memory is still 1.2 GB. Free memory was 952.8 MB in the beginning and 946.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:21:53,024 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.87 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 422.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4851.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.8 MB in the end (delta: 190.2 MB). Peak memory consumption was 190.2 MB. Max. memory is 11.5 GB. * Witness Printer took 71.78 ms. Allocated memory is still 1.2 GB. Free memory was 952.8 MB in the beginning and 946.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. * 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 100 SDtfs, 28 SDslu, 337 SDs, 0 SdLazy, 174 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 15 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 15 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 11683 SizeOfPredicates, 7 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 26/50 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...