./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id2_b5_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive-simple/id2_b5_o10.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 6f330f622534898bf170bbd5a7ac37bee3deb574 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:44,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:44,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:44,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:44,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:44,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:44,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:44,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:44,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:44,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:44,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:44,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:44,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:44,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:44,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:44,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:44,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:44,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:44,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:44,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:44,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:44,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:44,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:44,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:44,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:44,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:44,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:44,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:44,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:44,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:44,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:44,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:44,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:44,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:44,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:44,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:44,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:44,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:44,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:44,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:44,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:44,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:44,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:44,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:44,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:44,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:44,413 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:44,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:44,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:44,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:44,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:44,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:44,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:44,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:44,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:44,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:44,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:44,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:44,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:44,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:44,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:44,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:44,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:44,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:44,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:44,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:44,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:44,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:44,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:44,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:44,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:44,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 6f330f622534898bf170bbd5a7ac37bee3deb574 [2019-11-28 17:29:44,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:44,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:44,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:44,787 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:44,789 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:44,790 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-11-28 17:29:44,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a2521c58/d75626b75b9e4b248f4862cc223170c4/FLAG8dea54cfe [2019-11-28 17:29:45,285 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:45,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-11-28 17:29:45,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a2521c58/d75626b75b9e4b248f4862cc223170c4/FLAG8dea54cfe [2019-11-28 17:29:45,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a2521c58/d75626b75b9e4b248f4862cc223170c4 [2019-11-28 17:29:45,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:45,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:45,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:45,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:45,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:45,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e45741f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45, skipping insertion in model container [2019-11-28 17:29:45,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:45,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:45,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:45,867 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:45,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:45,895 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:45,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45 WrapperNode [2019-11-28 17:29:45,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:45,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:45,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:45,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:45,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:45,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:45,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:45,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:45,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (1/1) ... [2019-11-28 17:29:45,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:45,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:45,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:45,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:45,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (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 [2019-11-28 17:29:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-28 17:29:46,056 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-28 17:29:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:46,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:29:46,056 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:29:46,239 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:46,239 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:46,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:46 BoogieIcfgContainer [2019-11-28 17:29:46,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:46,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:46,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:46,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:46,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:45" (1/3) ... [2019-11-28 17:29:46,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d578c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:46, skipping insertion in model container [2019-11-28 17:29:46,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:45" (2/3) ... [2019-11-28 17:29:46,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d578c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:46, skipping insertion in model container [2019-11-28 17:29:46,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:46" (3/3) ... [2019-11-28 17:29:46,249 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2019-11-28 17:29:46,262 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:46,273 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:46,287 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:46,343 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:46,343 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:46,343 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:46,343 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:46,344 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:46,350 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:46,350 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:46,350 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-28 17:29:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:46,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:46,402 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:46,403 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2019-11-28 17:29:46,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:46,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708255072] [2019-11-28 17:29:46,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:46,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708255072] [2019-11-28 17:29:46,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:46,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:46,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558578921] [2019-11-28 17:29:46,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:46,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:46,708 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-28 17:29:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:46,762 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-28 17:29:46,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:46,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:46,774 INFO L225 Difference]: With dead ends: 35 [2019-11-28 17:29:46,774 INFO L226 Difference]: Without dead ends: 22 [2019-11-28 17:29:46,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-28 17:29:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-28 17:29:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:29:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-28 17:29:46,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-28 17:29:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:46,826 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-28 17:29:46,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-28 17:29:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:29:46,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:46,828 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:46,829 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2019-11-28 17:29:46,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:46,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271353839] [2019-11-28 17:29:46,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:46,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271353839] [2019-11-28 17:29:46,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:46,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:46,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442440813] [2019-11-28 17:29:46,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:46,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:46,999 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-11-28 17:29:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:47,020 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-28 17:29:47,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:47,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-28 17:29:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:47,022 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:29:47,022 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:29:47,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:29:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-28 17:29:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:29:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-28 17:29:47,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-11-28 17:29:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:47,030 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-28 17:29:47,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-28 17:29:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:29:47,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:47,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:47,032 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2019-11-28 17:29:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:47,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220381392] [2019-11-28 17:29:47,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:47,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220381392] [2019-11-28 17:29:47,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:47,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-28 17:29:47,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988050012] [2019-11-28 17:29:47,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:47,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:47,235 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-28 17:29:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:47,320 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-28 17:29:47,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:47,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-28 17:29:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:47,323 INFO L225 Difference]: With dead ends: 44 [2019-11-28 17:29:47,323 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 17:29:47,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:29:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 17:29:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-28 17:29:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-28 17:29:47,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-28 17:29:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:47,332 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-28 17:29:47,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-28 17:29:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:29:47,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:47,334 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:47,334 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash -971845561, now seen corresponding path program 1 times [2019-11-28 17:29:47,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:47,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956539399] [2019-11-28 17:29:47,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:47,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956539399] [2019-11-28 17:29:47,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:47,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:47,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018826068] [2019-11-28 17:29:47,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:47,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:47,473 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-28 17:29:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:47,500 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-28 17:29:47,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:47,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-28 17:29:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:47,504 INFO L225 Difference]: With dead ends: 46 [2019-11-28 17:29:47,504 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:29:47,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:29:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-28 17:29:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 17:29:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-28 17:29:47,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2019-11-28 17:29:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:47,513 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-28 17:29:47,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-28 17:29:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:29:47,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:47,515 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:47,515 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2019-11-28 17:29:47,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:47,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757188401] [2019-11-28 17:29:47,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:47,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757188401] [2019-11-28 17:29:47,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266674761] [2019-11-28 17:29:47,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:29:47,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:47,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:29:47,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856690978] [2019-11-28 17:29:47,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:29:47,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:29:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:47,955 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2019-11-28 17:29:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:48,095 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-11-28 17:29:48,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:29:48,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-28 17:29:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:48,097 INFO L225 Difference]: With dead ends: 60 [2019-11-28 17:29:48,097 INFO L226 Difference]: Without dead ends: 40 [2019-11-28 17:29:48,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:29:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-28 17:29:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-11-28 17:29:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:29:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-28 17:29:48,112 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-11-28 17:29:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:48,112 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-28 17:29:48,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:29:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-28 17:29:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-28 17:29:48,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:48,115 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:48,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:48,319 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash -222974932, now seen corresponding path program 1 times [2019-11-28 17:29:48,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:48,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117067755] [2019-11-28 17:29:48,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:29:48,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117067755] [2019-11-28 17:29:48,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382947688] [2019-11-28 17:29:48,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:29:48,682 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:29:48,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:48,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 17:29:48,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966707524] [2019-11-28 17:29:48,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:29:48,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:29:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:48,779 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2019-11-28 17:29:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:48,975 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-11-28 17:29:48,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:29:48,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-28 17:29:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:48,982 INFO L225 Difference]: With dead ends: 68 [2019-11-28 17:29:48,982 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 17:29:48,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:29:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 17:29:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-28 17:29:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:29:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-28 17:29:48,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-11-28 17:29:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:48,998 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-28 17:29:48,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:29:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-28 17:29:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 17:29:49,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:49,001 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:49,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:49,202 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:49,203 INFO L82 PathProgramCache]: Analyzing trace with hash -141607649, now seen corresponding path program 2 times [2019-11-28 17:29:49,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:49,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520351807] [2019-11-28 17:29:49,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 17:29:49,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520351807] [2019-11-28 17:29:49,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35158907] [2019-11-28 17:29:49,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:49,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:49,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:49,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 17:29:49,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 17:29:49,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:49,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-28 17:29:49,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272740035] [2019-11-28 17:29:49,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:29:49,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:29:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:29:49,740 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 18 states. [2019-11-28 17:29:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:50,008 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-11-28 17:29:50,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:29:50,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-28 17:29:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:50,010 INFO L225 Difference]: With dead ends: 76 [2019-11-28 17:29:50,010 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 17:29:50,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:29:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 17:29:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2019-11-28 17:29:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 17:29:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-28 17:29:50,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2019-11-28 17:29:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:50,030 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-28 17:29:50,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:29:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-28 17:29:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-28 17:29:50,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:50,035 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:50,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:50,240 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -90623267, now seen corresponding path program 2 times [2019-11-28 17:29:50,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:50,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156279307] [2019-11-28 17:29:50,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-28 17:29:50,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156279307] [2019-11-28 17:29:50,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851722026] [2019-11-28 17:29:50,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:50,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 17:29:50,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:50,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:50,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-28 17:29:50,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:29:50,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2019-11-28 17:29:50,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938121621] [2019-11-28 17:29:50,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:50,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:29:50,873 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2019-11-28 17:29:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:50,883 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-28 17:29:50,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:50,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-11-28 17:29:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:50,884 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:29:50,884 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:29:50,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:29:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:29:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:29:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:29:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:29:50,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-11-28 17:29:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:50,887 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:29:50,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:29:50,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:29:51,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:51,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:29:51,105 INFO L246 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2019-11-28 17:29:51,106 INFO L249 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2019-11-28 17:29:51,106 INFO L246 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-28 17:29:51,106 INFO L246 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-11-28 17:29:51,106 INFO L246 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-11-28 17:29:51,106 INFO L249 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-11-28 17:29:51,106 INFO L246 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-11-28 17:29:51,106 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:29:51,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:29:51,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:29:51,107 INFO L246 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-28 17:29:51,107 INFO L246 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L249 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point L21(lines 21 27) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-11-28 17:29:51,108 INFO L246 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-28 17:29:51,109 INFO L249 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2019-11-28 17:29:51,109 INFO L246 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-28 17:29:51,109 INFO L246 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-11-28 17:29:51,110 INFO L249 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-11-28 17:29:51,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:29:51 BoogieIcfgContainer [2019-11-28 17:29:51,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:29:51,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:29:51,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:29:51,121 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:29:51,122 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:46" (3/4) ... [2019-11-28 17:29:51,129 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:29:51,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-11-28 17:29:51,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 17:29:51,143 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:29:51,144 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:29:51,199 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:29:51,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:29:51,202 INFO L168 Benchmark]: Toolchain (without parser) took 5532.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.8 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -112.9 MB). Peak memory consumption was 86.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,203 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:51,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.79 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,204 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:51,205 INFO L168 Benchmark]: Boogie Preprocessor took 69.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,206 INFO L168 Benchmark]: RCFGBuilder took 250.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,210 INFO L168 Benchmark]: TraceAbstraction took 4874.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.2 MB). Peak memory consumption was 101.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,211 INFO L168 Benchmark]: Witness Printer took 82.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:51,220 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 224.79 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 24.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 250.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4874.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.2 MB). Peak memory consumption was 101.7 MB. Max. memory is 11.5 GB. * Witness Printer took 82.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 3 procedures, 23 locations, 1 error locations. Result: SAFE, OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 25 SDslu, 1327 SDs, 0 SdLazy, 412 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 332 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 36678 SizeOfPredicates, 14 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 90/150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...