./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c --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/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c -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 a544811fe2a74801350302afc46fb67e1c6f238a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:51:12,315 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:51:12,318 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:51:12,335 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:51:12,336 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:51:12,337 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:51:12,339 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:51:12,342 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:51:12,345 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:51:12,348 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:51:12,351 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:51:12,352 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:51:12,353 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:51:12,354 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:51:12,357 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:51:12,358 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:51:12,360 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:51:12,369 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:51:12,376 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:51:12,378 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:51:12,381 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:51:12,384 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:51:12,388 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:51:12,391 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:51:12,391 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:51:12,392 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:51:12,396 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:51:12,397 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:51:12,397 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:51:12,399 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:51:12,399 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:51:12,400 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:51:12,400 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:51:12,400 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:51:12,402 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:51:12,402 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:51:12,403 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:51:12,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:51:12,420 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:51:12,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:51:12,421 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:51:12,423 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:51:12,423 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:51:12,423 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:51:12,423 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:51:12,424 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:51:12,425 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:51:12,426 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:51:12,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:51:12,426 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:51:12,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:51:12,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:51:12,427 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:51:12,428 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:51:12,428 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:51:12,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:51:12,428 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:51:12,428 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:51:12,429 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:51:12,429 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:51:12,429 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:51:12,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:51:12,429 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 -> a544811fe2a74801350302afc46fb67e1c6f238a [2018-11-28 18:51:12,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:51:12,486 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:51:12,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:51:12,492 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:51:12,492 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:51:12,493 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-11-28 18:51:12,550 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a108ec0/f75aba71736346a3abda8e0528ed7455/FLAG30f06275b [2018-11-28 18:51:12,988 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:51:12,988 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-11-28 18:51:12,995 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a108ec0/f75aba71736346a3abda8e0528ed7455/FLAG30f06275b [2018-11-28 18:51:13,369 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a108ec0/f75aba71736346a3abda8e0528ed7455 [2018-11-28 18:51:13,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:51:13,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:51:13,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:13,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:51:13,381 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:51:13,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342b49b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13, skipping insertion in model container [2018-11-28 18:51:13,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:51:13,413 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:51:13,661 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:13,666 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:51:13,687 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:13,706 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:51:13,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13 WrapperNode [2018-11-28 18:51:13,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:13,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:13,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:51:13,709 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:51:13,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:13,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:51:13,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:51:13,739 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:51:13,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (1/1) ... [2018-11-28 18:51:13,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:51:13,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:51:13,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:51:13,766 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:51:13,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (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 18:51:13,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:51:13,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:51:13,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:51:13,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:51:13,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:51:13,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:51:13,918 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-28 18:51:13,918 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-28 18:51:14,087 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:51:14,088 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:51:14,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:14 BoogieIcfgContainer [2018-11-28 18:51:14,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:51:14,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:51:14,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:51:14,095 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:51:14,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:51:13" (1/3) ... [2018-11-28 18:51:14,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da28f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:14, skipping insertion in model container [2018-11-28 18:51:14,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:13" (2/3) ... [2018-11-28 18:51:14,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da28f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:14, skipping insertion in model container [2018-11-28 18:51:14,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:14" (3/3) ... [2018-11-28 18:51:14,101 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_false-unreach-call_true-termination.c [2018-11-28 18:51:14,112 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:51:14,122 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:51:14,142 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:51:14,179 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:51:14,180 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:51:14,180 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:51:14,180 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:51:14,181 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:51:14,181 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:51:14,181 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:51:14,181 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:51:14,182 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:51:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 18:51:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:51:14,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:14,213 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:14,216 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:14,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-28 18:51:14,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:14,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:14,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:14,551 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 18:51:14,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:51:14,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:51:14,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:51:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:51:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:51:14,577 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 18:51:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:14,724 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 18:51:14,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:51:14,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:51:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:14,738 INFO L225 Difference]: With dead ends: 30 [2018-11-28 18:51:14,739 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 18:51:14,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 18:51:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 18:51:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 18:51:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 18:51:14,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 18:51:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:14,797 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 18:51:14,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:51:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 18:51:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 18:51:14,800 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:14,800 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:14,801 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:14,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-28 18:51:14,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:14,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:14,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:14,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:51:15,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:15,143 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 18:51:15,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:15,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:51:15,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:15,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:51:15,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:51:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:51:15,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:15,268 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 18:51:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:15,499 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 18:51:15,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:51:15,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 18:51:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:15,501 INFO L225 Difference]: With dead ends: 25 [2018-11-28 18:51:15,501 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:51:15,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:51:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:51:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:51:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:51:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 18:51:15,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 18:51:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:15,509 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 18:51:15,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:51:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 18:51:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 18:51:15,511 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:15,511 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:15,511 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:15,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-28 18:51:15,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:15,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:15,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:15,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:51:15,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:15,841 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 18:51:15,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:15,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:15,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:15,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:51:15,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:15,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:51:15,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:51:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:51:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:51:15,941 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-28 18:51:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:16,057 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 18:51:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:51:16,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-28 18:51:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:16,063 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:51:16,064 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 18:51:16,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:51:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 18:51:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 18:51:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 18:51:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 18:51:16,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-28 18:51:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:16,080 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 18:51:16,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:51:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 18:51:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 18:51:16,081 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:16,084 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:16,084 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:16,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-28 18:51:16,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:16,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:16,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:16,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 18:51:16,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:16,322 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 18:51:16,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:16,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 18:51:16,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:16,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 18:51:16,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:16,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 18:51:16,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:51:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:51:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:51:16,408 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-28 18:51:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:16,456 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 18:51:16,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:51:16,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-28 18:51:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:16,458 INFO L225 Difference]: With dead ends: 31 [2018-11-28 18:51:16,459 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 18:51:16,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:51:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 18:51:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 18:51:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 18:51:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 18:51:16,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-28 18:51:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:16,467 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 18:51:16,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:51:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 18:51:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 18:51:16,469 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:16,469 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:16,469 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:16,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-28 18:51:16,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:16,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:16,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:16,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 18:51:16,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:16,982 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:51:17,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:17,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:17,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:17,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 18:51:17,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:17,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 18:51:17,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:51:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:51:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:51:17,108 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-28 18:51:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:17,276 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-28 18:51:17,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:51:17,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-28 18:51:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:17,281 INFO L225 Difference]: With dead ends: 34 [2018-11-28 18:51:17,281 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:51:17,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:51:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:51:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:51:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:51:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-28 18:51:17,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-28 18:51:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:17,289 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-28 18:51:17,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:51:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-28 18:51:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 18:51:17,291 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:17,291 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:17,291 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:17,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-28 18:51:17,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:17,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:17,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:17,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:17,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 18:51:17,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:17,560 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:17,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:17,673 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 18:51:17,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:17,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 18:51:17,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:17,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 18:51:17,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:51:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:51:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:17,743 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-28 18:51:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:17,835 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-28 18:51:17,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:51:17,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-28 18:51:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:17,843 INFO L225 Difference]: With dead ends: 37 [2018-11-28 18:51:17,844 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 18:51:17,844 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 18:51:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 18:51:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:51:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 18:51:17,852 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-28 18:51:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:17,853 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 18:51:17,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:51:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 18:51:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 18:51:17,855 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:17,855 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:17,855 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:17,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-28 18:51:17,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:17,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:17,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:17,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:17,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 18:51:18,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:18,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:18,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:18,245 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 18:51:18,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:18,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 18:51:18,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:18,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-11-28 18:51:18,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 18:51:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 18:51:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:51:18,528 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-11-28 18:51:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:19,210 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-28 18:51:19,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:51:19,211 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-11-28 18:51:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:19,212 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:51:19,213 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:51:19,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 18:51:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:51:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-28 18:51:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 18:51:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-28 18:51:19,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-28 18:51:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:19,221 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-28 18:51:19,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 18:51:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-28 18:51:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 18:51:19,223 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:19,223 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:19,223 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:19,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-28 18:51:19,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:19,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 18:51:19,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:19,469 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:51:19,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:19,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 18:51:19,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:19,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-11-28 18:51:19,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:51:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:51:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:19,800 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-11-28 18:51:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:20,613 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-28 18:51:20,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 18:51:20,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-11-28 18:51:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:20,616 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:51:20,616 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:51:20,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 18:51:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:51:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 18:51:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 18:51:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 18:51:20,626 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-28 18:51:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:20,627 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 18:51:20,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:51:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 18:51:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 18:51:20,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:20,630 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:20,630 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:20,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-28 18:51:20,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:20,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:20,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:20,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:20,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 18:51:20,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:20,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:20,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:20,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:20,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:20,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 18:51:20,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:20,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 18:51:20,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 18:51:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 18:51:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:51:20,892 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-28 18:51:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:21,065 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-28 18:51:21,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 18:51:21,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-28 18:51:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:21,071 INFO L225 Difference]: With dead ends: 46 [2018-11-28 18:51:21,071 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 18:51:21,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:51:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 18:51:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 18:51:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 18:51:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 18:51:21,079 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-28 18:51:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:21,082 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 18:51:21,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 18:51:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 18:51:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-28 18:51:21,083 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:21,083 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:21,083 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:21,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-28 18:51:21,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:21,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:21,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:21,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:21,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 18:51:21,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:21,290 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:51:21,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:21,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 18:51:21,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:21,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 18:51:22,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:22,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-11-28 18:51:22,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-28 18:51:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-28 18:51:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 18:51:22,056 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-11-28 18:51:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:22,650 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-28 18:51:22,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 18:51:22,651 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-11-28 18:51:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:22,653 INFO L225 Difference]: With dead ends: 49 [2018-11-28 18:51:22,654 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 18:51:22,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 18:51:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 18:51:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 18:51:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 18:51:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-28 18:51:22,667 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-28 18:51:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:22,667 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-28 18:51:22,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-28 18:51:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-28 18:51:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 18:51:22,669 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:22,669 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:22,669 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:22,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-28 18:51:22,672 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:22,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:22,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:22,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 18:51:22,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:22,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:22,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:22,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:22,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:22,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 18:51:22,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:22,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 18:51:22,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:51:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:51:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:22,978 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-28 18:51:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:23,282 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-28 18:51:23,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:51:23,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-28 18:51:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:23,289 INFO L225 Difference]: With dead ends: 52 [2018-11-28 18:51:23,289 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 18:51:23,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:51:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 18:51:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 18:51:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:51:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 18:51:23,296 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-28 18:51:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:23,296 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 18:51:23,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:51:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 18:51:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-28 18:51:23,298 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:23,298 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:23,298 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:23,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-28 18:51:23,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:23,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:23,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:23,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 18:51:23,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:23,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:51:23,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:23,746 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 18:51:23,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:23,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 18:51:23,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:23,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 18:51:23,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 18:51:23,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 18:51:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:51:23,811 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-28 18:51:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:24,204 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-28 18:51:24,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 18:51:24,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-28 18:51:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:24,207 INFO L225 Difference]: With dead ends: 55 [2018-11-28 18:51:24,208 INFO L226 Difference]: Without dead ends: 51 [2018-11-28 18:51:24,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:51:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-28 18:51:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-28 18:51:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-28 18:51:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-28 18:51:24,216 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-28 18:51:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:24,216 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-28 18:51:24,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 18:51:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-28 18:51:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 18:51:24,218 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:24,218 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:24,218 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:24,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-28 18:51:24,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:24,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:24,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:24,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:24,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 18:51:24,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:24,726 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:24,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:24,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 18:51:24,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:24,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 18:51:24,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:24,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 18:51:24,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:51:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:51:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:24,817 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-11-28 18:51:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:24,901 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-28 18:51:24,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 18:51:24,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-11-28 18:51:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:24,904 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:51:24,904 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 18:51:24,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 18:51:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 18:51:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 18:51:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-28 18:51:24,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-28 18:51:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:24,913 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-28 18:51:24,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:51:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-28 18:51:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-28 18:51:24,914 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:24,914 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:24,914 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:24,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-28 18:51:24,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:24,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:24,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:24,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:24,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 18:51:25,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:25,874 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:25,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:25,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 18:51:26,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:26,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-11-28 18:51:26,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-28 18:51:26,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-28 18:51:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 18:51:26,388 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-11-28 18:51:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:27,853 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-28 18:51:27,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 18:51:27,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-11-28 18:51:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:27,854 INFO L225 Difference]: With dead ends: 61 [2018-11-28 18:51:27,854 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 18:51:27,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 18:51:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 18:51:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-28 18:51:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 18:51:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-28 18:51:27,865 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-28 18:51:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:27,865 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-28 18:51:27,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-28 18:51:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-28 18:51:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 18:51:27,866 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:27,867 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:27,867 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:27,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-28 18:51:27,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:27,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:27,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:27,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:27,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 18:51:28,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:28,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:28,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:28,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:28,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:28,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 18:51:28,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:28,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-11-28 18:51:28,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-28 18:51:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-28 18:51:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 18:51:28,787 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-11-28 18:51:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:29,691 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-28 18:51:29,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 18:51:29,692 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-11-28 18:51:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:29,694 INFO L225 Difference]: With dead ends: 64 [2018-11-28 18:51:29,694 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 18:51:29,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-11-28 18:51:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 18:51:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-28 18:51:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-28 18:51:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-28 18:51:29,703 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-28 18:51:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:29,704 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-28 18:51:29,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-28 18:51:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-28 18:51:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-28 18:51:29,707 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:29,707 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:29,708 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:29,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-28 18:51:29,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:29,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:29,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:29,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:29,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 18:51:30,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:30,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:30,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:30,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 18:51:30,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:30,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 18:51:31,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:31,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-11-28 18:51:31,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-28 18:51:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-28 18:51:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-11-28 18:51:31,128 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-11-28 18:51:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:32,034 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-28 18:51:32,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-28 18:51:32,035 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-11-28 18:51:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:32,037 INFO L225 Difference]: With dead ends: 67 [2018-11-28 18:51:32,037 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 18:51:32,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 18:51:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 18:51:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-28 18:51:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 18:51:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-28 18:51:32,045 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-28 18:51:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:32,045 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-28 18:51:32,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-28 18:51:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-28 18:51:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:51:32,047 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:32,047 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:32,047 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:32,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-28 18:51:32,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:32,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:32,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:32,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:32,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 18:51:32,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:32,504 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:32,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:32,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:32,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:32,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 18:51:33,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:33,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-11-28 18:51:33,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-28 18:51:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-28 18:51:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-11-28 18:51:33,200 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-11-28 18:51:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:34,252 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-28 18:51:34,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 18:51:34,253 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-11-28 18:51:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:34,255 INFO L225 Difference]: With dead ends: 70 [2018-11-28 18:51:34,255 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 18:51:34,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-11-28 18:51:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 18:51:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-28 18:51:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 18:51:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-28 18:51:34,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-28 18:51:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:34,263 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-28 18:51:34,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-28 18:51:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-28 18:51:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-28 18:51:34,264 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:34,265 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:34,265 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:34,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-28 18:51:34,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:34,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:34,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 18:51:34,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:34,521 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:34,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:34,573 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 18:51:34,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:34,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 18:51:35,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:35,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-11-28 18:51:35,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-28 18:51:35,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-28 18:51:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-11-28 18:51:35,337 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-11-28 18:51:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:36,695 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-28 18:51:36,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 18:51:36,696 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-11-28 18:51:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:36,697 INFO L225 Difference]: With dead ends: 73 [2018-11-28 18:51:36,698 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:51:36,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-11-28 18:51:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:51:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 18:51:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 18:51:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-28 18:51:36,706 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-28 18:51:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:36,707 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-28 18:51:36,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-28 18:51:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-28 18:51:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 18:51:36,708 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:36,708 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:36,708 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:36,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-28 18:51:36,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:36,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:36,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:36,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 18:51:37,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:37,094 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:37,103 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:37,150 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-28 18:51:37,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:37,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 18:51:38,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:38,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-11-28 18:51:38,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-28 18:51:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-28 18:51:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-11-28 18:51:38,011 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-11-28 18:51:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:39,312 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-28 18:51:39,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-28 18:51:39,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-11-28 18:51:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:39,319 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:51:39,319 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 18:51:39,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-11-28 18:51:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 18:51:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-28 18:51:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-28 18:51:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-28 18:51:39,325 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-28 18:51:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:39,328 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-28 18:51:39,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-28 18:51:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-28 18:51:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-28 18:51:39,329 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:39,329 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:39,329 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:39,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-28 18:51:39,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:39,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:39,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:39,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:39,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 18:51:39,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:39,729 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:39,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:39,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 18:51:39,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:39,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-28 18:51:39,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 18:51:39,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 18:51:39,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-28 18:51:39,830 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-28 18:51:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:40,331 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-28 18:51:40,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 18:51:40,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-28 18:51:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:40,334 INFO L225 Difference]: With dead ends: 79 [2018-11-28 18:51:40,334 INFO L226 Difference]: Without dead ends: 75 [2018-11-28 18:51:40,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 18:51:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-28 18:51:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-28 18:51:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-28 18:51:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-28 18:51:40,340 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-28 18:51:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:40,340 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-28 18:51:40,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 18:51:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-28 18:51:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 18:51:40,341 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:40,341 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:40,341 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:40,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-28 18:51:40,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:40,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:40,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:40,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:40,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-28 18:51:40,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:40,918 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:40,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:40,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:40,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:40,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-28 18:51:41,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:41,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 18:51:41,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 18:51:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 18:51:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:51:41,018 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-28 18:51:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:41,427 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-28 18:51:41,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 18:51:41,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-28 18:51:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:41,429 INFO L225 Difference]: With dead ends: 82 [2018-11-28 18:51:41,429 INFO L226 Difference]: Without dead ends: 78 [2018-11-28 18:51:41,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 18:51:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-28 18:51:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-28 18:51:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-28 18:51:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-28 18:51:41,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-28 18:51:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:41,436 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-28 18:51:41,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 18:51:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-28 18:51:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-28 18:51:41,439 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:41,440 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:41,440 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:41,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-11-28 18:51:41,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:41,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:41,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:41,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:41,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-28 18:51:41,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:41,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:41,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:41,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-28 18:51:41,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:41,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-28 18:51:41,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:41,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-28 18:51:41,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 18:51:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 18:51:41,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:51:41,924 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-28 18:51:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:42,373 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-28 18:51:42,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 18:51:42,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-28 18:51:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:42,380 INFO L225 Difference]: With dead ends: 85 [2018-11-28 18:51:42,380 INFO L226 Difference]: Without dead ends: 81 [2018-11-28 18:51:42,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 18:51:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-28 18:51:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-28 18:51:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-28 18:51:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-28 18:51:42,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-28 18:51:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:42,396 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-28 18:51:42,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 18:51:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-28 18:51:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 18:51:42,400 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:42,400 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:42,400 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:42,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2018-11-28 18:51:42,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:42,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:42,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:42,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-28 18:51:43,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:43,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:43,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:43,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:43,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:43,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-28 18:51:43,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:43,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 18:51:43,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 18:51:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 18:51:43,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-28 18:51:43,226 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-28 18:51:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:43,758 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-28 18:51:43,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 18:51:43,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-28 18:51:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:43,761 INFO L225 Difference]: With dead ends: 88 [2018-11-28 18:51:43,761 INFO L226 Difference]: Without dead ends: 84 [2018-11-28 18:51:43,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 18:51:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-28 18:51:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-28 18:51:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-28 18:51:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-28 18:51:43,768 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-28 18:51:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:43,768 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-28 18:51:43,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 18:51:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-28 18:51:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-28 18:51:43,772 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:43,772 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:43,772 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:43,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2018-11-28 18:51:43,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:43,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:43,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:43,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:43,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-28 18:51:44,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:44,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:44,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:44,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-28 18:51:44,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:44,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-28 18:51:44,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:44,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-28 18:51:44,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 18:51:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 18:51:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:51:44,462 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-28 18:51:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:46,142 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-28 18:51:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 18:51:46,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-28 18:51:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:46,145 INFO L225 Difference]: With dead ends: 91 [2018-11-28 18:51:46,146 INFO L226 Difference]: Without dead ends: 87 [2018-11-28 18:51:46,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 18:51:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-28 18:51:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-28 18:51:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 18:51:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-28 18:51:46,153 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-28 18:51:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:46,154 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-28 18:51:46,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 18:51:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-28 18:51:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 18:51:46,155 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:46,155 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:46,156 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:46,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2018-11-28 18:51:46,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:46,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:46,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:46,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:46,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-28 18:51:46,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:46,660 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:46,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:47,024 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-28 18:51:47,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:47,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-28 18:51:47,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:47,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 18:51:47,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:51:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:51:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:47,110 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-28 18:51:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:47,624 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-28 18:51:47,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 18:51:47,626 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-28 18:51:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:47,628 INFO L225 Difference]: With dead ends: 94 [2018-11-28 18:51:47,628 INFO L226 Difference]: Without dead ends: 90 [2018-11-28 18:51:47,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 18:51:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-28 18:51:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-28 18:51:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 18:51:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-28 18:51:47,635 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-28 18:51:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:47,636 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-28 18:51:47,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:51:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-28 18:51:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-28 18:51:47,639 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:47,639 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:47,640 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:47,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2018-11-28 18:51:47,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:47,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:47,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:47,694 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:51:47,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:51:47 BoogieIcfgContainer [2018-11-28 18:51:47,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:51:47,743 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:51:47,743 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:51:47,743 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:51:47,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:14" (3/4) ... [2018-11-28 18:51:47,748 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:51:47,821 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:51:47,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:51:47,822 INFO L168 Benchmark]: Toolchain (without parser) took 34448.04 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 460.3 MB). Free memory was 951.3 MB in the beginning and 1.2 GB in the end (delta: -256.6 MB). Peak memory consumption was 203.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:47,825 INFO L168 Benchmark]: CDTParser took 0.15 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 18:51:47,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.42 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:47,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.00 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:47,827 INFO L168 Benchmark]: Boogie Preprocessor took 26.63 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:47,828 INFO L168 Benchmark]: RCFGBuilder took 323.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -164.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:47,828 INFO L168 Benchmark]: TraceAbstraction took 33651.82 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 339.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -102.9 MB). Peak memory consumption was 236.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:47,830 INFO L168 Benchmark]: Witness Printer took 78.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:47,834 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 331.42 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 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 30.00 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.63 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 323.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -164.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33651.82 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 339.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -102.9 MB). Peak memory consumption was 236.8 MB. Max. memory is 11.5 GB. * Witness Printer took 78.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 33.5s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 15.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 326 SDtfs, 602 SDslu, 5076 SDs, 0 SdLazy, 2907 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3230 GetRequests, 2161 SyntacticMatches, 0 SemanticMatches, 1069 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10899 ImplicationChecksByTransitivity, 23.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, 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: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 4400 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1084776 SizeOfPredicates, 278 NumberOfNonLiveVariables, 4968 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...