./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-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/sum_25x0_true-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 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:52:45,268 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:52:45,270 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:52:45,282 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:52:45,282 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:52:45,283 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:52:45,284 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:52:45,286 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:52:45,288 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:52:45,288 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:52:45,289 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:52:45,290 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:52:45,291 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:52:45,292 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:52:45,293 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:52:45,293 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:52:45,294 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:52:45,296 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:52:45,298 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:52:45,300 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:52:45,301 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:52:45,302 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:52:45,304 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:52:45,305 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:52:45,305 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:52:45,306 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:52:45,307 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:52:45,308 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:52:45,309 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:52:45,310 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:52:45,310 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:52:45,311 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:52:45,311 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:52:45,311 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:52:45,312 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:52:45,313 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:52:45,313 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:52:45,345 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:52:45,345 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:52:45,347 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:52:45,347 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:52:45,348 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:52:45,348 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:52:45,348 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:52:45,349 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:52:45,349 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:52:45,349 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:52:45,349 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:52:45,349 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:52:45,349 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:52:45,350 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:52:45,352 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:52:45,352 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:52:45,352 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:52:45,352 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:52:45,352 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:45,353 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:52:45,353 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:52:45,353 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:52:45,353 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:52:45,353 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:52:45,353 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:52:45,354 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 -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2018-11-28 18:52:45,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:52:45,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:52:45,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:52:45,435 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:52:45,436 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:52:45,436 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-28 18:52:45,503 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47b3b0db/e4a95c237b724ad2be5d4a9404494cce/FLAG11a1e0b8f [2018-11-28 18:52:45,983 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:52:45,983 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-28 18:52:45,991 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47b3b0db/e4a95c237b724ad2be5d4a9404494cce/FLAG11a1e0b8f [2018-11-28 18:52:46,353 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47b3b0db/e4a95c237b724ad2be5d4a9404494cce [2018-11-28 18:52:46,356 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:52:46,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:52:46,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:46,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:52:46,364 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:52:46,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d25767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46, skipping insertion in model container [2018-11-28 18:52:46,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:52:46,396 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:52:46,575 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:46,580 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:52:46,598 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:46,616 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:52:46,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46 WrapperNode [2018-11-28 18:52:46,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:46,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:46,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:52:46,618 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:52:46,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:46,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:52:46,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:52:46,642 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:52:46,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (1/1) ... [2018-11-28 18:52:46,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:52:46,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:52:46,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:52:46,672 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:52:46,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (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 18:52:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-28 18:52:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-28 18:52:46,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:47,018 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:47,019 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:47,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:47 BoogieIcfgContainer [2018-11-28 18:52:47,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:47,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:47,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:47,024 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:47,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:52:46" (1/3) ... [2018-11-28 18:52:47,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579fa8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:47, skipping insertion in model container [2018-11-28 18:52:47,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:46" (2/3) ... [2018-11-28 18:52:47,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579fa8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:47, skipping insertion in model container [2018-11-28 18:52:47,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:47" (3/3) ... [2018-11-28 18:52:47,027 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0_true-unreach-call_true-termination.c [2018-11-28 18:52:47,038 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:47,046 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:47,065 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:47,099 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:47,100 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:47,100 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:47,100 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:47,100 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:47,101 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:47,101 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:47,101 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:47,102 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 18:52:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:47,128 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:47,129 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:47,132 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:47,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-28 18:52:47,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:47,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:47,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:47,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:47,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:47,488 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 18:52:47,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:47,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:47,517 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 18:52:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:47,672 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 18:52:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:47,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:47,691 INFO L225 Difference]: With dead ends: 30 [2018-11-28 18:52:47,692 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 18:52:47,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 18:52:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 18:52:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 18:52:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 18:52:47,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 18:52:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:47,740 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 18:52:47,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 18:52:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 18:52:47,742 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:47,742 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 18:52:47,742 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:47,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-28 18:52:47,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:47,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:47,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:47,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:47,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:47,835 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 18:52:47,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:47,836 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 18:52:47,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:47,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:47,954 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 18:52:47,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:47,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:52:47,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:52:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:52:47,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:47,980 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 18:52:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:48,337 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 18:52:48,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:52:48,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 18:52:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:48,339 INFO L225 Difference]: With dead ends: 25 [2018-11-28 18:52:48,339 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:52:48,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:52:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:52:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 18:52:48,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 18:52:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:48,351 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 18:52:48,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:52:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 18:52:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 18:52:48,354 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:48,354 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 18:52:48,355 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:48,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-28 18:52:48,356 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:48,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:48,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:48,617 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 18:52:48,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:48,618 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 18:52:48,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:48,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:48,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:48,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:48,681 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 18:52:48,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:48,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:52:48,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:52:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:52:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:52:48,703 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-28 18:52:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:48,938 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 18:52:48,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:52:48,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-28 18:52:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:48,942 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:52:48,942 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 18:52:48,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 18:52:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 18:52:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 18:52:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 18:52:48,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-28 18:52:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 18:52:48,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:52:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 18:52:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 18:52:48,951 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:48,951 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 18:52:48,952 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:48,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-28 18:52:48,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:48,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:48,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:48,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:48,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:49,076 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 18:52:49,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:49,076 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 18:52:49,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:49,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 18:52:49,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:49,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:49,181 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 18:52:49,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:49,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 18:52:49,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:49,203 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-28 18:52:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:49,647 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 18:52:49,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:49,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-28 18:52:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:49,651 INFO L225 Difference]: With dead ends: 31 [2018-11-28 18:52:49,651 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 18:52:49,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 18:52:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 18:52:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 18:52:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 18:52:49,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-28 18:52:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:49,661 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 18:52:49,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 18:52:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 18:52:49,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:49,664 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 18:52:49,664 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:49,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-28 18:52:49,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:49,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:49,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:49,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:49,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:49,859 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 18:52:49,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:49,860 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 18:52:49,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:49,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:49,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:49,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:49,934 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 18:52:49,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:49,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 18:52:49,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:52:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:52:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:49,965 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-28 18:52:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:50,132 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-28 18:52:50,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:52:50,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-28 18:52:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:50,134 INFO L225 Difference]: With dead ends: 34 [2018-11-28 18:52:50,134 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:52:50,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:52:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:52:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:52:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-28 18:52:50,142 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-28 18:52:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:50,142 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-28 18:52:50,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:52:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-28 18:52:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 18:52:50,144 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:50,144 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 18:52:50,145 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:50,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:50,145 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-28 18:52:50,145 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:50,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:50,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:50,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:50,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:50,498 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 18:52:50,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:50,499 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 18:52:50,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:52:50,546 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 18:52:50,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:50,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:50,575 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 18:52:50,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:50,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 18:52:50,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:50,596 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-28 18:52:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:50,831 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-28 18:52:50,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:50,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-28 18:52:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:50,841 INFO L225 Difference]: With dead ends: 37 [2018-11-28 18:52:50,841 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 18:52:50,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:52:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 18:52:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 18:52:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:52:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 18:52:50,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-28 18:52:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:50,849 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 18:52:50,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 18:52:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 18:52:50,851 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:50,851 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 18:52:50,852 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:50,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-28 18:52:50,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:50,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:50,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:50,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:50,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:51,033 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 18:52:51,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:51,034 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 18:52:51,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:52:51,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 18:52:51,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:51,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:51,136 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 18:52:51,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:51,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 18:52:51,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:52:51,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:52:51,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:52:51,157 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-28 18:52:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:51,348 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-28 18:52:51,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:51,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-28 18:52:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:51,350 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:52:51,351 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:52:51,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:52:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-28 18:52:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 18:52:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-28 18:52:51,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-28 18:52:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:51,359 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-28 18:52:51,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:52:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-28 18:52:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 18:52:51,361 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:51,361 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 18:52:51,362 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:51,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-28 18:52:51,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:51,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:51,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:51,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:51,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:51,525 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 18:52:51,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:51,525 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 18:52:51,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:51,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:51,593 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 18:52:51,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:51,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 18:52:51,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:52:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:52:51,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:51,613 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-28 18:52:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:51,977 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-28 18:52:51,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:52:51,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-28 18:52:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:51,980 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:52:51,981 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:52:51,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:52:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:52:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 18:52:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 18:52:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 18:52:51,991 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-28 18:52:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:51,991 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 18:52:51,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:52:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 18:52:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 18:52:51,993 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:51,993 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 18:52:51,994 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:51,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:51,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-28 18:52:51,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:51,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:51,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:51,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:51,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:52,618 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 18:52:52,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:52,618 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 18:52:52,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:52,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:52,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:52,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:52,711 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 18:52:52,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:52,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 18:52:52,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 18:52:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 18:52:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:52:52,732 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-28 18:52:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:52,932 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-28 18:52:52,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 18:52:52,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-28 18:52:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:52,937 INFO L225 Difference]: With dead ends: 46 [2018-11-28 18:52:52,937 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 18:52:52,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:52:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 18:52:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 18:52:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 18:52:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 18:52:52,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-28 18:52:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:52,946 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 18:52:52,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 18:52:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 18:52:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-28 18:52:52,947 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:52,947 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 18:52:52,947 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:52,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-28 18:52:52,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:52,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:52,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:52,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:52,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:53,241 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 18:52:53,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:53,241 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 18:52:53,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:53,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 18:52:53,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:53,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:53,407 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 18:52:53,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:53,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-28 18:52:53,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:53,438 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-28 18:52:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:53,675 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-28 18:52:53,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 18:52:53,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-28 18:52:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:53,678 INFO L225 Difference]: With dead ends: 49 [2018-11-28 18:52:53,678 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 18:52:53,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-28 18:52:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 18:52:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 18:52:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 18:52:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-28 18:52:53,685 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-28 18:52:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:53,686 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-28 18:52:53,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-28 18:52:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 18:52:53,687 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:53,688 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 18:52:53,688 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:53,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-28 18:52:53,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:53,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:53,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:53,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:53,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:53,887 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 18:52:53,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:53,887 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 18:52:53,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:53,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:53,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:53,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:53,998 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 18:52:54,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:54,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 18:52:54,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:52:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:52:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:54,022 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-28 18:52:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:54,286 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-28 18:52:54,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:52:54,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-28 18:52:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:54,291 INFO L225 Difference]: With dead ends: 52 [2018-11-28 18:52:54,292 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 18:52:54,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:52:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 18:52:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 18:52:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:52:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 18:52:54,299 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-28 18:52:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:54,299 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 18:52:54,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:52:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 18:52:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-28 18:52:54,302 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:54,302 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 18:52:54,302 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:54,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:54,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-28 18:52:54,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:54,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:54,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:54,619 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 18:52:54,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:54,619 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 18:52:54,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:52:54,693 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 18:52:54,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:54,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:54,727 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 18:52:54,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:54,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 18:52:54,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 18:52:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 18:52:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:52:54,758 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-28 18:52:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:55,112 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-28 18:52:55,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 18:52:55,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-28 18:52:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:55,115 INFO L225 Difference]: With dead ends: 55 [2018-11-28 18:52:55,115 INFO L226 Difference]: Without dead ends: 51 [2018-11-28 18:52:55,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-28 18:52:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-28 18:52:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-28 18:52:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-28 18:52:55,124 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-28 18:52:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:55,124 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-28 18:52:55,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 18:52:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-28 18:52:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 18:52:55,128 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:55,128 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 18:52:55,128 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:55,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-28 18:52:55,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:55,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:55,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:55,557 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 18:52:55,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:55,557 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 18:52:55,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:52:55,611 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 18:52:55,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:55,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:55,657 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 18:52:55,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:55,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-28 18:52:55,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 18:52:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 18:52:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-28 18:52:55,688 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-28 18:52:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:56,191 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-28 18:52:56,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:52:56,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-28 18:52:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:56,194 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:52:56,195 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 18:52:56,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-28 18:52:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 18:52:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 18:52:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 18:52:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-28 18:52:56,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-28 18:52:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:56,207 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-28 18:52:56,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 18:52:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-28 18:52:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-28 18:52:56,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:56,221 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 18:52:56,221 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:56,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-28 18:52:56,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:56,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:56,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:56,495 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 18:52:56,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:56,495 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 18:52:56,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:56,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:56,575 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 18:52:56,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:56,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-28 18:52:56,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 18:52:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 18:52:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:56,600 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-28 18:52:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:56,960 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-28 18:52:56,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 18:52:56,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-28 18:52:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:56,962 INFO L225 Difference]: With dead ends: 61 [2018-11-28 18:52:56,962 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 18:52:56,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-28 18:52:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 18:52:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-28 18:52:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 18:52:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-28 18:52:56,974 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-28 18:52:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:56,975 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-28 18:52:56,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 18:52:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-28 18:52:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 18:52:56,978 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:56,978 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 18:52:56,979 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:56,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-28 18:52:56,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:56,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:56,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:56,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:56,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:57,262 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 18:52:57,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:57,263 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 18:52:57,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:57,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:57,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:57,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:57,361 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 18:52:57,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:57,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-28 18:52:57,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 18:52:57,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 18:52:57,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:52:57,387 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-28 18:52:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:57,949 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-28 18:52:57,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 18:52:57,950 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-28 18:52:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:57,951 INFO L225 Difference]: With dead ends: 64 [2018-11-28 18:52:57,952 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 18:52:57,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 18:52:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 18:52:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-28 18:52:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-28 18:52:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-28 18:52:57,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-28 18:52:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:57,961 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-28 18:52:57,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 18:52:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-28 18:52:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-28 18:52:57,962 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:57,962 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 18:52:57,964 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:57,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-28 18:52:57,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:57,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:57,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:57,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:57,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:58,468 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 18:52:58,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:58,469 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:52:58,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:58,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 18:52:58,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:58,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:58,624 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 18:52:58,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:58,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-28 18:52:58,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 18:52:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 18:52:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:52:58,653 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-28 18:52:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:59,013 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-28 18:52:59,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 18:52:59,014 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-28 18:52:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:59,015 INFO L225 Difference]: With dead ends: 67 [2018-11-28 18:52:59,015 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 18:52:59,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 18:52:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 18:52:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-28 18:52:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 18:52:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-28 18:52:59,022 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-28 18:52:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:59,023 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-28 18:52:59,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 18:52:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-28 18:52:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:52:59,026 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:59,026 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 18:52:59,026 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:59,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:59,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-28 18:52:59,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:59,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:59,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:59,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:59,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:00,047 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 18:53:00,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:00,048 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 18:53:00,057 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:53:00,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:53:00,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:00,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:00,175 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 18:53:00,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:00,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-28 18:53:00,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 18:53:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 18:53:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-28 18:53:00,205 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-28 18:53:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:00,686 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-28 18:53:00,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 18:53:00,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-28 18:53:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:00,688 INFO L225 Difference]: With dead ends: 70 [2018-11-28 18:53:00,688 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 18:53:00,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 18:53:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 18:53:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-28 18:53:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 18:53:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-28 18:53:00,696 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-28 18:53:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:00,696 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-28 18:53:00,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 18:53:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-28 18:53:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-28 18:53:00,699 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:00,699 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 18:53:00,700 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:00,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-28 18:53:00,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:00,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:00,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:00,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:00,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:00,985 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 18:53:00,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:00,985 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 18:53:00,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:53:01,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 18:53:01,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:01,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:01,122 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 18:53:01,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:01,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-28 18:53:01,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 18:53:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 18:53:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:53:01,144 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-28 18:53:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:01,529 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-28 18:53:01,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 18:53:01,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-28 18:53:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:01,532 INFO L225 Difference]: With dead ends: 73 [2018-11-28 18:53:01,532 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:53:01,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 18:53:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:53:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 18:53:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 18:53:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-28 18:53:01,539 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-28 18:53:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:01,542 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-28 18:53:01,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 18:53:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-28 18:53:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 18:53:01,544 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:01,544 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 18:53:01,544 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:01,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-28 18:53:01,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:01,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:01,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:01,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:01,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:01,912 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 18:53:01,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:01,913 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 18:53:01,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:53:01,976 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-28 18:53:01,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:01,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:02,027 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 18:53:02,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:02,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-28 18:53:02,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 18:53:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 18:53:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-28 18:53:02,048 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-28 18:53:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:02,864 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-28 18:53:02,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 18:53:02,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-28 18:53:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:02,867 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:53:02,867 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 18:53:02,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 18:53:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 18:53:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-28 18:53:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-28 18:53:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-28 18:53:02,873 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-28 18:53:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:02,873 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-28 18:53:02,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 18:53:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-28 18:53:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-28 18:53:02,876 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:02,876 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 18:53:02,877 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:02,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-28 18:53:02,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:02,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:02,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:02,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:02,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:03,220 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 18:53:03,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:03,220 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 18:53:03,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:53:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:03,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:03,318 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 18:53:03,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:03,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-28 18:53:03,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 18:53:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 18:53:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-28 18:53:03,338 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-28 18:53:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:04,089 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-28 18:53:04,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 18:53:04,091 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-28 18:53:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:04,092 INFO L225 Difference]: With dead ends: 79 [2018-11-28 18:53:04,092 INFO L226 Difference]: Without dead ends: 75 [2018-11-28 18:53:04,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 18:53:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-28 18:53:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-28 18:53:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-28 18:53:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-28 18:53:04,100 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-28 18:53:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:04,101 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-28 18:53:04,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 18:53:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-28 18:53:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 18:53:04,104 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:04,104 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 18:53:04,105 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:04,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-28 18:53:04,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:04,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:04,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:04,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:53:04,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:04,948 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 18:53:04,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:04,948 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 18:53:04,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:53:05,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:53:05,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:05,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:05,049 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 18:53:05,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:05,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 18:53:05,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 18:53:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 18:53:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:53:05,069 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-28 18:53:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:05,477 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-28 18:53:05,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 18:53:05,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-28 18:53:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:05,479 INFO L225 Difference]: With dead ends: 82 [2018-11-28 18:53:05,479 INFO L226 Difference]: Without dead ends: 78 [2018-11-28 18:53:05,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 18:53:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-28 18:53:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-28 18:53:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-28 18:53:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-28 18:53:05,486 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-28 18:53:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:05,488 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-28 18:53:05,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 18:53:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-28 18:53:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-28 18:53:05,489 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:05,489 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 18:53:05,491 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:05,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-28 18:53:05,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:05,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:05,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:05,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:05,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:06,223 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 18:53:06,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:06,223 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 18:53:06,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:53:06,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-28 18:53:06,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:06,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:06,342 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 18:53:06,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:06,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-28 18:53:06,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 18:53:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 18:53:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:53:06,363 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-28 18:53:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:06,935 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-28 18:53:06,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 18:53:06,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-28 18:53:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:06,940 INFO L225 Difference]: With dead ends: 85 [2018-11-28 18:53:06,940 INFO L226 Difference]: Without dead ends: 81 [2018-11-28 18:53:06,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 18:53:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-28 18:53:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-28 18:53:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-28 18:53:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-28 18:53:06,953 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-28 18:53:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:06,955 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-28 18:53:06,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 18:53:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-28 18:53:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 18:53:06,956 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:06,956 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 18:53:06,956 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:06,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2018-11-28 18:53:06,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:06,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:06,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:06,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:06,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:07,456 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 18:53:07,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:07,457 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 18:53:07,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:53:07,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:53:07,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:07,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:07,579 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 18:53:07,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:07,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 18:53:07,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 18:53:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 18:53:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-28 18:53:07,600 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-28 18:53:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:08,343 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-28 18:53:08,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 18:53:08,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-28 18:53:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:08,346 INFO L225 Difference]: With dead ends: 88 [2018-11-28 18:53:08,346 INFO L226 Difference]: Without dead ends: 84 [2018-11-28 18:53:08,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 18:53:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-28 18:53:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-28 18:53:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-28 18:53:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-28 18:53:08,353 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-28 18:53:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:08,354 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-28 18:53:08,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 18:53:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-28 18:53:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-28 18:53:08,354 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:08,355 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 18:53:08,355 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:08,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2018-11-28 18:53:08,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:08,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:08,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:08,783 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 18:53:08,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:08,784 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 18:53:08,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:53:08,878 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-28 18:53:08,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:08,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:08,926 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 18:53:08,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:08,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-28 18:53:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 18:53:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 18:53:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:53:08,946 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-28 18:53:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:09,464 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-28 18:53:09,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 18:53:09,466 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-28 18:53:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:09,467 INFO L225 Difference]: With dead ends: 91 [2018-11-28 18:53:09,468 INFO L226 Difference]: Without dead ends: 87 [2018-11-28 18:53:09,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 18:53:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-28 18:53:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-28 18:53:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 18:53:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-28 18:53:09,476 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-28 18:53:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:09,476 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-28 18:53:09,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 18:53:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-28 18:53:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 18:53:09,479 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:09,480 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 18:53:09,480 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:09,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2018-11-28 18:53:09,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:09,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:09,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:09,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:09,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:10,053 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 18:53:10,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:10,054 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 18:53:10,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:53:10,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-28 18:53:10,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:53:10,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:10,483 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 18:53:10,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:10,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 18:53:10,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:53:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:53:10,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:53:10,503 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-28 18:53:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:11,014 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-28 18:53:11,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 18:53:11,015 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-28 18:53:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:11,017 INFO L225 Difference]: With dead ends: 94 [2018-11-28 18:53:11,017 INFO L226 Difference]: Without dead ends: 90 [2018-11-28 18:53:11,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 18:53:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-28 18:53:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-28 18:53:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 18:53:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-28 18:53:11,023 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-28 18:53:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:11,024 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-28 18:53:11,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:53:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-28 18:53:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-28 18:53:11,027 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:53:11,027 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 18:53:11,027 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:53:11,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:53:11,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2018-11-28 18:53:11,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:53:11,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:53:11,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:11,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:53:11,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:53:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-28 18:53:14,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:53:14,417 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:53:14,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:53:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:53:14,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:53:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-28 18:53:21,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:53:21,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2018-11-28 18:53:21,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-11-28 18:53:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-11-28 18:53:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=12497, Unknown=0, NotChecked=0, Total=13340 [2018-11-28 18:53:21,300 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 116 states. [2018-11-28 18:53:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:53:28,881 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-28 18:53:28,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-28 18:53:28,882 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 163 [2018-11-28 18:53:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:53:28,883 INFO L225 Difference]: With dead ends: 93 [2018-11-28 18:53:28,883 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:53:28,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=2079, Invalid=26651, Unknown=0, NotChecked=0, Total=28730 [2018-11-28 18:53:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:53:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:53:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:53:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:53:28,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2018-11-28 18:53:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:53:28,890 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:53:28,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-11-28 18:53:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:53:28,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:53:28,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:53:28,971 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:53:28,971 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:53:28,971 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:53:28,971 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:53:28,971 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:53:28,971 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:53:28,971 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-28 18:53:28,972 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-11-28 18:53:28,972 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-28 18:53:28,972 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-28 18:53:28,972 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-28 18:53:28,972 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-28 18:53:28,972 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-28 18:53:28,972 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-28 18:53:28,972 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-28 18:53:28,973 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-28 18:53:28,973 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-28 18:53:28,973 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 25) (<= 25 main_~a~0)) [2018-11-28 18:53:28,973 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-28 18:53:28,973 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-28 18:53:28,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:53:28 BoogieIcfgContainer [2018-11-28 18:53:28,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:53:28,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:53:28,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:53:28,977 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:53:28,977 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:47" (3/4) ... [2018-11-28 18:53:28,984 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:53:28,993 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:53:28,994 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-28 18:53:28,994 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:53:29,003 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:53:29,006 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 18:53:29,006 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:53:29,054 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:53:29,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:53:29,056 INFO L168 Benchmark]: Toolchain (without parser) took 42698.84 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 454.6 MB). Free memory was 951.4 MB in the beginning and 822.8 MB in the end (delta: 128.6 MB). Peak memory consumption was 583.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:53:29,060 INFO L168 Benchmark]: CDTParser took 0.44 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 18:53:29,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 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 18:53:29,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.02 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 18:53:29,062 INFO L168 Benchmark]: Boogie Preprocessor took 29.56 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 18:53:29,062 INFO L168 Benchmark]: RCFGBuilder took 347.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-11-28 18:53:29,063 INFO L168 Benchmark]: TraceAbstraction took 41955.74 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 1.1 GB in the beginning and 823.0 MB in the end (delta: 264.1 MB). Peak memory consumption was 615.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:53:29,064 INFO L168 Benchmark]: Witness Printer took 77.57 ms. Allocated memory is still 1.5 GB. Free memory was 823.0 MB in the beginning and 822.8 MB in the end (delta: 219.4 kB). Peak memory consumption was 219.4 kB. Max. memory is 11.5 GB. [2018-11-28 18:53:29,078 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 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 257.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 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 24.02 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 29.56 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 347.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41955.74 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 1.1 GB in the beginning and 823.0 MB in the end (delta: 264.1 MB). Peak memory consumption was 615.9 MB. Max. memory is 11.5 GB. * Witness Printer took 77.57 ms. Allocated memory is still 1.5 GB. Free memory was 823.0 MB in the beginning and 822.8 MB in the end (delta: 219.4 kB). Peak memory consumption was 219.4 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 41.8s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 17.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 916 SDslu, 4555 SDs, 0 SdLazy, 5554 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3437 GetRequests, 2569 SyntacticMatches, 0 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 28.3s 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, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 4563 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548000 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6750 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17751/33800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...