./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer --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 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 23:00:30,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:00:30,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:00:30,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:00:30,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:00:30,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:00:30,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:00:30,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:00:30,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:00:30,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:00:30,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:00:30,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:00:30,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:00:30,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:00:30,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:00:30,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:00:30,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:00:30,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:00:30,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:00:30,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:00:30,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:00:30,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:00:30,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:00:30,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:00:30,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:00:30,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:00:30,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:00:30,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:00:30,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:00:30,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:00:30,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:00:30,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:00:30,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:00:30,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:00:30,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:00:30,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:00:30,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:00:30,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:00:30,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:00:30,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:00:30,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:00:30,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 23:00:30,484 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:00:30,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:00:30,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:00:30,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:00:30,486 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:00:30,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:00:30,487 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:00:30,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:00:30,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:00:30,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:00:30,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 23:00:30,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:00:30,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 23:00:30,488 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:00:30,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 23:00:30,488 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:00:30,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 23:00:30,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:00:30,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:00:30,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:00:30,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:00:30,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:00:30,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:00:30,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:00:30,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 23:00:30,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 23:00:30,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 23:00:30,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 23:00:30,491 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer 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 -> 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 [2019-11-19 23:00:30,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:00:30,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:00:30,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:00:30,667 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:00:30,667 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:00:30,668 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-11-19 23:00:30,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/data/b695f7efa/3b19253e429840f39ccdbcb00c24d088/FLAG7e2305c9f [2019-11-19 23:00:31,125 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:00:31,125 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-11-19 23:00:31,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/data/b695f7efa/3b19253e429840f39ccdbcb00c24d088/FLAG7e2305c9f [2019-11-19 23:00:31,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/data/b695f7efa/3b19253e429840f39ccdbcb00c24d088 [2019-11-19 23:00:31,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:00:31,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 23:00:31,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:00:31,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:00:31,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:00:31,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:31,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9e5bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31, skipping insertion in model container [2019-11-19 23:00:31,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:31,593 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:00:31,609 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:00:31,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:00:31,839 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:00:31,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:00:31,985 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:00:31,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31 WrapperNode [2019-11-19 23:00:31,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:00:31,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 23:00:31,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 23:00:31,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 23:00:31,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 23:00:32,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:00:32,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:00:32,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:00:32,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... [2019-11-19 23:00:32,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:00:32,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:00:32,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:00:32,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:00:32,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/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 [2019-11-19 23:00:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:00:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:00:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-19 23:00:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-19 23:00:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-19 23:00:32,116 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-19 23:00:32,333 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:00:32,345 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 23:00:32,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:00:32 BoogieIcfgContainer [2019-11-19 23:00:32,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:00:32,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:00:32,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:00:32,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:00:32,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:00:31" (1/3) ... [2019-11-19 23:00:32,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5fe9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:00:32, skipping insertion in model container [2019-11-19 23:00:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:00:31" (2/3) ... [2019-11-19 23:00:32,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5fe9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:00:32, skipping insertion in model container [2019-11-19 23:00:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:00:32" (3/3) ... [2019-11-19 23:00:32,354 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2019-11-19 23:00:32,380 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:00:32,395 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 23:00:32,423 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 23:00:32,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:00:32,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 23:00:32,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:00:32,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:00:32,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:00:32,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:00:32,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:00:32,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:00:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-19 23:00:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 23:00:32,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:32,489 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:00:32,490 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-19 23:00:32,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:32,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999924038] [2019-11-19 23:00:32,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:00:32,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999924038] [2019-11-19 23:00:32,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:00:32,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:00:32,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311098316] [2019-11-19 23:00:32,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:00:32,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:00:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:00:32,731 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-19 23:00:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:32,835 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-19 23:00:32,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:00:32,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-19 23:00:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:32,848 INFO L225 Difference]: With dead ends: 38 [2019-11-19 23:00:32,848 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 23:00:32,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:00:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 23:00:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 23:00:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 23:00:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-19 23:00:32,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-19 23:00:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:32,905 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-19 23:00:32,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:00:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-19 23:00:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:00:32,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:32,907 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:00:32,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-19 23:00:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:32,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941205789] [2019-11-19 23:00:32,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:00:32,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941205789] [2019-11-19 23:00:32,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:00:32,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:00:32,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371646916] [2019-11-19 23:00:32,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:00:32,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:00:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:00:32,978 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-19 23:00:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:33,070 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-19 23:00:33,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:00:33,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-19 23:00:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:33,072 INFO L225 Difference]: With dead ends: 32 [2019-11-19 23:00:33,072 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 23:00:33,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:00:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 23:00:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-19 23:00:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 23:00:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-19 23:00:33,082 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-19 23:00:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:33,083 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-19 23:00:33,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:00:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-19 23:00:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-19 23:00:33,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:33,085 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:00:33,086 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-19 23:00:33,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:33,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720001076] [2019-11-19 23:00:33,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:00:33,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720001076] [2019-11-19 23:00:33,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472061191] [2019-11-19 23:00:33,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/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 [2019-11-19 23:00:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:00:33,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:00:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:00:33,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:00:33,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-19 23:00:33,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001040374] [2019-11-19 23:00:33,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:00:33,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:00:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:00:33,319 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-11-19 23:00:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:33,420 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2019-11-19 23:00:33,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:00:33,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-19 23:00:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:33,422 INFO L225 Difference]: With dead ends: 54 [2019-11-19 23:00:33,422 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 23:00:33,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:00:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 23:00:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-19 23:00:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 23:00:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-19 23:00:33,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2019-11-19 23:00:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:33,433 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-19 23:00:33,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:00:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-19 23:00:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:00:33,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:33,436 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] [2019-11-19 23:00:33,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:00:33,647 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-19 23:00:33,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:33,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943932942] [2019-11-19 23:00:33,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 23:00:33,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943932942] [2019-11-19 23:00:33,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510067784] [2019-11-19 23:00:33,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/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 [2019-11-19 23:00:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:33,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 23:00:33,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:00:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 23:00:34,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:00:34,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 23:00:34,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495678367] [2019-11-19 23:00:34,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:00:34,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:34,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:00:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:00:34,060 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2019-11-19 23:00:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:34,155 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2019-11-19 23:00:34,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:00:34,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-19 23:00:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:34,159 INFO L225 Difference]: With dead ends: 42 [2019-11-19 23:00:34,159 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 23:00:34,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:00:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 23:00:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-11-19 23:00:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-19 23:00:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-19 23:00:34,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2019-11-19 23:00:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:34,172 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-19 23:00:34,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:00:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-19 23:00:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-19 23:00:34,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:34,174 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:00:34,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:00:34,386 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1239842987, now seen corresponding path program 1 times [2019-11-19 23:00:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:34,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701902030] [2019-11-19 23:00:34,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 23:00:34,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701902030] [2019-11-19 23:00:34,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548639756] [2019-11-19 23:00:34,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/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 [2019-11-19 23:00:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:34,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:00:34,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:00:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:00:34,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:00:34,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2019-11-19 23:00:34,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601937439] [2019-11-19 23:00:34,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:00:34,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:00:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:00:34,622 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 7 states. [2019-11-19 23:00:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:34,759 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-11-19 23:00:34,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:00:34,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-19 23:00:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:34,762 INFO L225 Difference]: With dead ends: 40 [2019-11-19 23:00:34,762 INFO L226 Difference]: Without dead ends: 36 [2019-11-19 23:00:34,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:00:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-19 23:00:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-19 23:00:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-19 23:00:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-19 23:00:34,773 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 24 [2019-11-19 23:00:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:34,773 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-19 23:00:34,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:00:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-19 23:00:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-19 23:00:34,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:00:34,776 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:00:34,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:00:34,982 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:00:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:00:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-19 23:00:34,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:00:34,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860345099] [2019-11-19 23:00:34,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:00:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 23:00:35,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860345099] [2019-11-19 23:00:35,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932373975] [2019-11-19 23:00:35,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/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 [2019-11-19 23:00:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:00:35,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:00:35,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:00:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 23:00:35,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:00:35,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-11-19 23:00:35,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822893668] [2019-11-19 23:00:35,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 23:00:35,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:00:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 23:00:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:00:35,367 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 15 states. [2019-11-19 23:00:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:00:35,751 INFO L93 Difference]: Finished difference Result 65 states and 96 transitions. [2019-11-19 23:00:35,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 23:00:35,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2019-11-19 23:00:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:00:35,753 INFO L225 Difference]: With dead ends: 65 [2019-11-19 23:00:35,753 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 23:00:35,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2019-11-19 23:00:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 23:00:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 23:00:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 23:00:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 23:00:35,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-11-19 23:00:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:00:35,756 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 23:00:35,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 23:00:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 23:00:35,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 23:00:35,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:00:35,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 23:00:36,116 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 23:00:36,116 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 23:00:36,116 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 23:00:36,117 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-19 23:00:36,117 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~x~0) [2019-11-19 23:00:36,117 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-19 23:00:36,117 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-19 23:00:36,117 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) [2019-11-19 23:00:36,118 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-19 23:00:36,118 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-19 23:00:36,118 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-19 23:00:36,118 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= 2 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2019-11-19 23:00:36,118 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-19 23:00:36,118 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (<= 2 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2019-11-19 23:00:36,118 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-19 23:00:36,119 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-19 23:00:36,119 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-19 23:00:36,119 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-19 23:00:36,119 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-19 23:00:36,119 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-19 23:00:36,119 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2019-11-19 23:00:36,119 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-19 23:00:36,120 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0))) [2019-11-19 23:00:36,120 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-19 23:00:36,120 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-19 23:00:36,120 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-19 23:00:36,120 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-19 23:00:36,120 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-19 23:00:36,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:00:36 BoogieIcfgContainer [2019-11-19 23:00:36,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:00:36,135 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:00:36,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:00:36,135 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:00:36,136 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:00:32" (3/4) ... [2019-11-19 23:00:36,139 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 23:00:36,145 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-19 23:00:36,145 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-19 23:00:36,150 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-19 23:00:36,150 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 23:00:36,203 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4229c356-029d-4d7b-800f-7678c6bd780f/bin/uautomizer/witness.graphml [2019-11-19 23:00:36,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:00:36,205 INFO L168 Benchmark]: Toolchain (without parser) took 4628.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 951.4 MB in the beginning and 852.2 MB in the end (delta: 99.3 MB). Peak memory consumption was 239.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,206 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:00:36,206 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,207 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:00:36,207 INFO L168 Benchmark]: Boogie Preprocessor took 21.36 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,208 INFO L168 Benchmark]: RCFGBuilder took 300.18 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,208 INFO L168 Benchmark]: TraceAbstraction took 3787.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 859.2 MB in the end (delta: 247.2 MB). Peak memory consumption was 247.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,209 INFO L168 Benchmark]: Witness Printer took 68.20 ms. Allocated memory is still 1.2 GB. Free memory was 859.2 MB in the beginning and 852.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-19 23:00:36,212 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 409.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.36 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 300.18 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3787.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 859.2 MB in the end (delta: 247.2 MB). Peak memory consumption was 247.2 MB. Max. memory is 11.5 GB. * Witness Printer took 68.20 ms. Allocated memory is still 1.2 GB. Free memory was 859.2 MB in the beginning and 852.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 2 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 154 SDtfs, 84 SDslu, 631 SDs, 0 SdLazy, 452 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 54 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 30 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 12299 SizeOfPredicates, 9 NumberOfNonLiveVariables, 239 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 39/58 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...