./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:54:18,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:54:18,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:54:18,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:54:18,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:54:18,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:54:18,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:54:18,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:54:18,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:54:18,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:54:18,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:54:18,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:54:18,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:54:18,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:54:18,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:54:18,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:54:18,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:54:18,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:54:18,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:54:18,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:54:18,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:54:18,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:54:18,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:54:18,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:54:18,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:54:18,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:54:18,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:54:18,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:54:18,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:54:18,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:54:18,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:54:18,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:54:18,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:54:18,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:54:18,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:54:18,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:54:18,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:54:18,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:54:18,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:54:18,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:54:18,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:54:18,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:54:18,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:54:18,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:54:18,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:54:18,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:54:18,437 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:54:18,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:54:18,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:54:18,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:54:18,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:54:18,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:54:18,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:54:18,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:54:18,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:54:18,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:54:18,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:54:18,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:54:18,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:54:18,449 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/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-10-22 08:54:18,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:54:18,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:54:18,492 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:54:18,493 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:54:18,493 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:54:18,493 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 08:54:18,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/data/fed3ba09b/024339bc5a5b404db392c3db422e617f/FLAG52d4015d6 [2019-10-22 08:54:18,951 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:54:18,952 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 08:54:18,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/data/fed3ba09b/024339bc5a5b404db392c3db422e617f/FLAG52d4015d6 [2019-10-22 08:54:19,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/data/fed3ba09b/024339bc5a5b404db392c3db422e617f [2019-10-22 08:54:19,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:54:19,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:54:19,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:54:19,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:54:19,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:54:19,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b9bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19, skipping insertion in model container [2019-10-22 08:54:19,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,376 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:54:19,389 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:54:19,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:54:19,519 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:54:19,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:54:19,599 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:54:19,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19 WrapperNode [2019-10-22 08:54:19,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:54:19,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:54:19,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:54:19,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:54:19,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:54:19,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:54:19,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:54:19,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:54:19,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... [2019-10-22 08:54:19,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:54:19,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:54:19,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:54:19,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:54:19,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 [2019-10-22 08:54:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:54:19,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:54:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 08:54:19,714 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 08:54:19,879 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:54:19,879 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:54:19,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:54:19 BoogieIcfgContainer [2019-10-22 08:54:19,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:54:19,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:54:19,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:54:19,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:54:19,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:54:19" (1/3) ... [2019-10-22 08:54:19,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2630caf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:54:19, skipping insertion in model container [2019-10-22 08:54:19,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:54:19" (2/3) ... [2019-10-22 08:54:19,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2630caf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:54:19, skipping insertion in model container [2019-10-22 08:54:19,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:54:19" (3/3) ... [2019-10-22 08:54:19,893 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-10-22 08:54:19,905 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:54:19,912 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:54:19,927 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:54:19,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:54:19,960 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:54:19,960 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:54:19,960 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:54:19,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:54:19,960 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:54:19,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:54:19,961 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:54:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 08:54:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:54:19,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:19,989 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:19,991 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-10-22 08:54:20,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:20,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173703493] [2019-10-22 08:54:20,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:54:20,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173703493] [2019-10-22 08:54:20,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:54:20,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:54:20,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048413673] [2019-10-22 08:54:20,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:54:20,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:54:20,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:54:20,283 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-22 08:54:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:20,383 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-10-22 08:54:20,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:54:20,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 08:54:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:20,396 INFO L225 Difference]: With dead ends: 29 [2019-10-22 08:54:20,397 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:54:20,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:54:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:54:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:54:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:54:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 08:54:20,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-10-22 08:54:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:20,441 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 08:54:20,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:54:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 08:54:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:54:20,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:20,443 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:20,443 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-10-22 08:54:20,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:20,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105040440] [2019-10-22 08:54:20,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:54:20,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105040440] [2019-10-22 08:54:20,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:54:20,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:54:20,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510624480] [2019-10-22 08:54:20,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:54:20,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:20,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:54:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:54:20,511 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-10-22 08:54:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:20,579 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-10-22 08:54:20,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:54:20,580 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-10-22 08:54:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:20,581 INFO L225 Difference]: With dead ends: 23 [2019-10-22 08:54:20,581 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:54:20,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:54:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:54:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 08:54:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:54:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 08:54:20,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-10-22 08:54:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:20,587 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 08:54:20,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:54:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 08:54:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:54:20,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:20,589 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:20,589 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-10-22 08:54:20,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:20,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176937360] [2019-10-22 08:54:20,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:20,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:54:20,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176937360] [2019-10-22 08:54:20,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751681688] [2019-10-22 08:54:20,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 [2019-10-22 08:54:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:20,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:54:20,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:54:20,838 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:20,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-10-22 08:54:20,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895150616] [2019-10-22 08:54:20,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:54:20,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:20,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:54:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:54:20,840 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 10 states. [2019-10-22 08:54:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:20,937 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-10-22 08:54:20,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:54:20,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-10-22 08:54:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:20,939 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:54:20,939 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:54:20,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:54:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:54:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-22 08:54:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:54:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-22 08:54:20,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-10-22 08:54:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:20,948 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-22 08:54:20,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:54:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-22 08:54:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:54:20,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:20,949 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:21,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:21,151 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-10-22 08:54:21,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:21,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861289444] [2019-10-22 08:54:21,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:21,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:21,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:54:21,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861289444] [2019-10-22 08:54:21,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394655009] [2019-10-22 08:54:21,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 [2019-10-22 08:54:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:54:21,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:54:21,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:21,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-10-22 08:54:21,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107747740] [2019-10-22 08:54:21,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:54:21,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:21,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:54:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:54:21,319 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 10 states. [2019-10-22 08:54:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:21,436 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-10-22 08:54:21,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:54:21,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-22 08:54:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:21,438 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:54:21,438 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 08:54:21,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:54:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 08:54:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-22 08:54:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 08:54:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-10-22 08:54:21,450 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-10-22 08:54:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:21,451 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-10-22 08:54:21,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:54:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-10-22 08:54:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:54:21,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:21,452 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:21,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:21,653 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-10-22 08:54:21,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:21,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700987762] [2019-10-22 08:54:21,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:21,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:21,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-22 08:54:21,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700987762] [2019-10-22 08:54:21,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307504166] [2019-10-22 08:54:21,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 [2019-10-22 08:54:21,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:54:21,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:54:21,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:54:21,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-22 08:54:21,880 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:21,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-22 08:54:21,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937576921] [2019-10-22 08:54:21,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:54:21,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:54:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:54:21,882 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 12 states. [2019-10-22 08:54:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:22,041 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-10-22 08:54:22,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:54:22,042 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-10-22 08:54:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:22,043 INFO L225 Difference]: With dead ends: 67 [2019-10-22 08:54:22,043 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:54:22,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:54:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:54:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-10-22 08:54:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:54:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-22 08:54:22,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-10-22 08:54:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:22,051 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-22 08:54:22,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:54:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-22 08:54:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 08:54:22,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:22,052 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:22,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:22,253 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-10-22 08:54:22,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:22,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601108613] [2019-10-22 08:54:22,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:22,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:22,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 08:54:22,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601108613] [2019-10-22 08:54:22,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600001403] [2019-10-22 08:54:22,434 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/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 [2019-10-22 08:54:22,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:54:22,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:54:22,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:54:22,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 08:54:22,505 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:22,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2019-10-22 08:54:22,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587202376] [2019-10-22 08:54:22,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:54:22,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:54:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:54:22,509 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 12 states. [2019-10-22 08:54:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:22,671 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-10-22 08:54:22,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:54:22,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-22 08:54:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:22,673 INFO L225 Difference]: With dead ends: 52 [2019-10-22 08:54:22,673 INFO L226 Difference]: Without dead ends: 48 [2019-10-22 08:54:22,673 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:54:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-22 08:54:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-10-22 08:54:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 08:54:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-10-22 08:54:22,685 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-10-22 08:54:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:22,688 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-10-22 08:54:22,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:54:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-10-22 08:54:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 08:54:22,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:22,690 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:22,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:22,891 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1133813247, now seen corresponding path program 3 times [2019-10-22 08:54:22,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:22,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945428054] [2019-10-22 08:54:22,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:22,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:22,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 73 proven. 128 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-22 08:54:23,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945428054] [2019-10-22 08:54:23,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183594766] [2019-10-22 08:54:23,218 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:23,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-22 08:54:23,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:54:23,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:54:23,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-10-22 08:54:23,319 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:23,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-22 08:54:23,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264620836] [2019-10-22 08:54:23,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 08:54:23,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 08:54:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:54:23,321 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 16 states. [2019-10-22 08:54:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:23,522 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-22 08:54:23,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:54:23,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2019-10-22 08:54:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:23,525 INFO L225 Difference]: With dead ends: 94 [2019-10-22 08:54:23,525 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 08:54:23,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:54:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 08:54:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-10-22 08:54:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-22 08:54:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-10-22 08:54:23,545 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 89 [2019-10-22 08:54:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:23,545 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-10-22 08:54:23,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 08:54:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-10-22 08:54:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-22 08:54:23,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:23,547 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:23,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:23,752 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -91709127, now seen corresponding path program 4 times [2019-10-22 08:54:23,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:23,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810620685] [2019-10-22 08:54:23,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:23,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:23,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-22 08:54:24,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810620685] [2019-10-22 08:54:24,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299122662] [2019-10-22 08:54:24,016 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:24,064 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:54:24,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:54:24,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:54:24,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-22 08:54:24,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:24,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 19 [2019-10-22 08:54:24,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098621557] [2019-10-22 08:54:24,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 08:54:24,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 08:54:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:54:24,104 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 19 states. [2019-10-22 08:54:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:24,356 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-22 08:54:24,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 08:54:24,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2019-10-22 08:54:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:24,358 INFO L225 Difference]: With dead ends: 93 [2019-10-22 08:54:24,358 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 08:54:24,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-10-22 08:54:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 08:54:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-10-22 08:54:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:54:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-10-22 08:54:24,371 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 78 [2019-10-22 08:54:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:24,371 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-10-22 08:54:24,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 08:54:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-10-22 08:54:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-22 08:54:24,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:24,373 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:24,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:24,574 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2413653, now seen corresponding path program 5 times [2019-10-22 08:54:24,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:24,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550511726] [2019-10-22 08:54:24,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:24,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:24,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:54:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-10-22 08:54:24,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550511726] [2019-10-22 08:54:24,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650816644] [2019-10-22 08:54:24,975 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:25,030 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-22 08:54:25,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:54:25,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:54:25,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:54:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-10-22 08:54:25,135 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:54:25,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 24 [2019-10-22 08:54:25,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891800949] [2019-10-22 08:54:25,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 08:54:25,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:54:25,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 08:54:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:54:25,137 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 24 states. [2019-10-22 08:54:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:54:25,493 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-10-22 08:54:25,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 08:54:25,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 132 [2019-10-22 08:54:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:54:25,495 INFO L225 Difference]: With dead ends: 110 [2019-10-22 08:54:25,495 INFO L226 Difference]: Without dead ends: 69 [2019-10-22 08:54:25,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 08:54:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-22 08:54:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2019-10-22 08:54:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 08:54:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-10-22 08:54:25,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 132 [2019-10-22 08:54:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:54:25,504 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-10-22 08:54:25,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 08:54:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-10-22 08:54:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 08:54:25,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:54:25,506 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 08:54:25,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:54:25,707 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:54:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:54:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 6 times [2019-10-22 08:54:25,708 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:54:25,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423202349] [2019-10-22 08:54:25,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:25,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:54:25,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:54:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:54:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:54:25,756 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:54:25,756 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:54:25,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:54:25 BoogieIcfgContainer [2019-10-22 08:54:25,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:54:25,798 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:54:25,798 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:54:25,798 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:54:25,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:54:19" (3/4) ... [2019-10-22 08:54:25,801 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:54:25,874 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_114dba98-c8da-4a2c-9fc4-0b24ced0b09d/bin/uautomizer/witness.graphml [2019-10-22 08:54:25,877 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:54:25,879 INFO L168 Benchmark]: Toolchain (without parser) took 6519.30 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 288.9 MB). Free memory was 942.0 MB in the beginning and 1.2 GB in the end (delta: -252.1 MB). Peak memory consumption was 36.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,879 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:54:25,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -205.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,880 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.93 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,880 INFO L168 Benchmark]: Boogie Preprocessor took 13.00 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,880 INFO L168 Benchmark]: RCFGBuilder took 236.28 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,881 INFO L168 Benchmark]: TraceAbstraction took 5913.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -73.2 MB). Peak memory consumption was 67.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,881 INFO L168 Benchmark]: Witness Printer took 79.34 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:54:25,886 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 238.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -205.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.93 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.00 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 236.28 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5913.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -73.2 MB). Peak memory consumption was 67.9 MB. Max. memory is 11.5 GB. * Witness Printer took 79.34 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 322 SDslu, 549 SDs, 0 SdLazy, 1208 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 38 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 956 NumberOfCodeBlocks, 875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 835 ConstructedInterpolants, 0 QuantifiedInterpolants, 141155 SizeOfPredicates, 31 NumberOfNonLiveVariables, 755 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2359/3498 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 incorrect! Received shutdown request...