./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ........................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan --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 Taipan --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 0.1.24-6b5699a [2019-11-26 02:51:22,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:51:22,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:51:22,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:51:22,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:51:22,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:51:22,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:51:22,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:51:22,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:51:22,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:51:22,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:51:22,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:51:22,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:51:22,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:51:22,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:51:22,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:51:22,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:51:22,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:51:22,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:51:22,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:51:22,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:51:22,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:51:22,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:51:22,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:51:22,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:51:22,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:51:22,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:51:22,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:51:22,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:51:22,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:51:22,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:51:22,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:51:22,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:51:22,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:51:22,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:51:22,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:51:22,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:51:22,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:51:22,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:51:22,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:51:22,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:51:22,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:51:22,379 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:51:22,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:51:22,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:51:22,391 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:51:22,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:51:22,392 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:51:22,392 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:51:22,392 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:51:22,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:51:22,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:51:22,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:51:22,393 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:51:22,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:51:22,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:51:22,394 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:51:22,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:51:22,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:51:22,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:51:22,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:51:22,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:51:22,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:51:22,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:51:22,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:51:22,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:51:22,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:51:22,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:51:22,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:51:22,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:51:22,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:51:22,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:51:22,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:51:22,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:51:22,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:51:22,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:51:22,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:51:22,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:51:22,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:51:22,399 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan 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 -> Taipan 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 [2019-11-26 02:51:22,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:51:22,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:51:22,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:51:22,579 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:51:22,579 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:51:22,580 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-26 02:51:22,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/bce3bf7ae/6d34fd1a1c8e49aca1129282cefce904/FLAG11ff67e31 [2019-11-26 02:51:22,991 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:51:22,991 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-26 02:51:22,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/bce3bf7ae/6d34fd1a1c8e49aca1129282cefce904/FLAG11ff67e31 [2019-11-26 02:51:23,374 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/bce3bf7ae/6d34fd1a1c8e49aca1129282cefce904 [2019-11-26 02:51:23,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:51:23,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:51:23,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:51:23,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:51:23,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:51:23,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56130585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23, skipping insertion in model container [2019-11-26 02:51:23,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:51:23,414 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:51:23,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:51:23,560 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:51:23,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:51:23,643 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:51:23,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23 WrapperNode [2019-11-26 02:51:23,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:51:23,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:51:23,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:51:23,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:51:23,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:51:23,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:51:23,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:51:23,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:51:23,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... [2019-11-26 02:51:23,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:51:23,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:51:23,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:51:23,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:51:23,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/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 [2019-11-26 02:51:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:51:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:51:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-26 02:51:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-26 02:51:23,968 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:51:23,968 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:51:23,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:51:23 BoogieIcfgContainer [2019-11-26 02:51:23,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:51:23,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:51:23,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:51:23,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:51:23,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:51:23" (1/3) ... [2019-11-26 02:51:23,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:51:23, skipping insertion in model container [2019-11-26 02:51:23,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:23" (2/3) ... [2019-11-26 02:51:23,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:51:23, skipping insertion in model container [2019-11-26 02:51:23,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:51:23" (3/3) ... [2019-11-26 02:51:23,986 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-11-26 02:51:23,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:51:24,010 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:51:24,022 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:51:24,054 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:51:24,055 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:51:24,055 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:51:24,055 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:51:24,055 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:51:24,055 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:51:24,056 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:51:24,056 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:51:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-26 02:51:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:51:24,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:24,085 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:24,086 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-26 02:51:24,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:51:24,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894161452] [2019-11-26 02:51:24,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:51:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:51:24,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894161452] [2019-11-26 02:51:24,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:51:24,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-26 02:51:24,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260916588] [2019-11-26 02:51:24,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:51:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:51:24,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:51:24,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:51:24,356 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 7 states. [2019-11-26 02:51:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:24,519 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-26 02:51:24,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:51:24,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:51:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:24,530 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:51:24,530 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:51:24,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:51:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:51:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:51:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:51:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-26 02:51:24,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-26 02:51:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:24,573 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-26 02:51:24,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:51:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-26 02:51:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:51:24,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:24,575 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:24,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-26 02:51:24,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:51:24,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864392723] [2019-11-26 02:51:24,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:51:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:51:24,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864392723] [2019-11-26 02:51:24,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:51:24,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-26 02:51:24,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900550730] [2019-11-26 02:51:24,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:51:24,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:51:24,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:51:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:51:24,637 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-11-26 02:51:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:24,749 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-26 02:51:24,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:51:24,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-26 02:51:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:24,751 INFO L225 Difference]: With dead ends: 23 [2019-11-26 02:51:24,751 INFO L226 Difference]: Without dead ends: 19 [2019-11-26 02:51:24,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:51:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-26 02:51:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-26 02:51:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:51:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-26 02:51:24,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-26 02:51:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:24,759 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-26 02:51:24,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:51:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-26 02:51:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:51:24,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:24,761 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:24,762 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-26 02:51:24,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:51:24,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677723960] [2019-11-26 02:51:24,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:51:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:51:24,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677723960] [2019-11-26 02:51:24,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976778775] [2019-11-26 02:51:24,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/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 [2019-11-26 02:51:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:24,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:24,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:51:25,054 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:25,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:51:25,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843719287] [2019-11-26 02:51:25,382 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:51:25,383 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:51:25,389 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:51:25,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:25,600 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:51:25,604 INFO L168 Benchmark]: Toolchain (without parser) took 2225.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -79.3 MB). Peak memory consumption was 75.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:25,604 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:51:25,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -209.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:25,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:25,606 INFO L168 Benchmark]: Boogie Preprocessor took 16.16 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. [2019-11-26 02:51:25,607 INFO L168 Benchmark]: RCFGBuilder took 281.28 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:25,607 INFO L168 Benchmark]: TraceAbstraction took 1631.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 107.5 MB). Peak memory consumption was 107.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:25,611 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -209.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.16 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. * RCFGBuilder took 281.28 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1631.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 107.5 MB). Peak memory consumption was 107.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:51:27,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:51:27,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:51:27,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:51:27,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:51:27,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:51:27,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:51:27,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:51:27,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:51:27,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:51:27,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:51:27,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:51:27,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:51:27,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:51:27,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:51:27,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:51:27,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:51:27,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:51:27,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:51:27,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:51:27,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:51:27,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:51:27,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:51:27,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:51:27,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:51:27,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:51:27,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:51:27,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:51:27,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:51:27,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:51:27,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:51:27,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:51:27,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:51:27,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:51:27,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:51:27,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:51:27,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:51:27,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:51:27,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:51:27,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:51:27,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:51:27,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:51:27,595 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:51:27,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:51:27,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:51:27,596 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:51:27,597 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:51:27,597 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:51:27,597 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:51:27,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:51:27,597 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:51:27,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:51:27,598 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:51:27,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:51:27,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:51:27,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:51:27,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:51:27,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:51:27,600 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:51:27,600 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:51:27,600 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:51:27,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:51:27,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:51:27,601 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:51:27,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:51:27,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:51:27,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:51:27,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:51:27,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:51:27,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:51:27,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:51:27,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:51:27,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:51:27,604 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:51:27,604 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:51:27,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:51:27,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:51:27,605 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan 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 -> Taipan 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 [2019-11-26 02:51:27,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:51:27,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:51:27,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:51:27,922 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:51:27,922 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:51:27,923 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-26 02:51:27,973 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/db60a0ca9/deac348688d0480f826e4fe2add1c9c1/FLAG89f612bca [2019-11-26 02:51:28,327 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:51:28,328 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-26 02:51:28,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/db60a0ca9/deac348688d0480f826e4fe2add1c9c1/FLAG89f612bca [2019-11-26 02:51:28,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/data/db60a0ca9/deac348688d0480f826e4fe2add1c9c1 [2019-11-26 02:51:28,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:51:28,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:51:28,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:51:28,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:51:28,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:51:28,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:28,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfe5f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28, skipping insertion in model container [2019-11-26 02:51:28,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:28,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:51:28,753 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:51:28,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:51:28,937 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:51:28,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:51:28,964 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:51:28,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28 WrapperNode [2019-11-26 02:51:28,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:51:28,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:51:28,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:51:28,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:51:28,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:28,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:51:29,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:51:29,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:51:29,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:51:29,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... [2019-11-26 02:51:29,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:51:29,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:51:29,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:51:29,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:51:29,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/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 [2019-11-26 02:51:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:51:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:51:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-26 02:51:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-26 02:51:29,272 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:51:29,272 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:51:29,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:51:29 BoogieIcfgContainer [2019-11-26 02:51:29,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:51:29,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:51:29,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:51:29,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:51:29,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:51:28" (1/3) ... [2019-11-26 02:51:29,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628980c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:51:29, skipping insertion in model container [2019-11-26 02:51:29,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:51:28" (2/3) ... [2019-11-26 02:51:29,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628980c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:51:29, skipping insertion in model container [2019-11-26 02:51:29,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:51:29" (3/3) ... [2019-11-26 02:51:29,279 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-11-26 02:51:29,288 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:51:29,310 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:51:29,321 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:51:29,351 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:51:29,351 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:51:29,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:51:29,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:51:29,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:51:29,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:51:29,352 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:51:29,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:51:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:51:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:51:29,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:29,387 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:29,388 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1543686946, now seen corresponding path program 1 times [2019-11-26 02:51:29,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:29,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [452571762] [2019-11-26 02:51:29,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:29,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:51:29,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:51:29,535 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:51:29,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [452571762] [2019-11-26 02:51:29,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:51:29,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-26 02:51:29,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387070794] [2019-11-26 02:51:29,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:51:29,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:51:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:51:29,647 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2019-11-26 02:51:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:29,718 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-11-26 02:51:29,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:51:29,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-26 02:51:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:29,728 INFO L225 Difference]: With dead ends: 36 [2019-11-26 02:51:29,728 INFO L226 Difference]: Without dead ends: 18 [2019-11-26 02:51:29,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:51:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-26 02:51:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-11-26 02:51:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 02:51:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-26 02:51:29,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-26 02:51:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:29,769 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-26 02:51:29,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:51:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-26 02:51:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:51:29,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:29,772 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:29,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:29,974 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash -120079710, now seen corresponding path program 1 times [2019-11-26 02:51:29,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:29,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [160019851] [2019-11-26 02:51:29,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:30,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:51:30,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-26 02:51:30,088 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-26 02:51:30,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160019851] [2019-11-26 02:51:30,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-26 02:51:30,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2019-11-26 02:51:30,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565183164] [2019-11-26 02:51:30,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:51:30,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:30,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:51:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:51:30,351 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 7 states. [2019-11-26 02:51:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:30,392 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-11-26 02:51:30,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:51:30,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-26 02:51:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:30,394 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:51:30,395 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:51:30,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:51:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:51:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-26 02:51:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:51:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-11-26 02:51:30,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 21 [2019-11-26 02:51:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:30,405 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-11-26 02:51:30,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:51:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-11-26 02:51:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:51:30,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:30,408 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:30,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:30,609 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash 844306575, now seen corresponding path program 1 times [2019-11-26 02:51:30,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:30,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1086481112] [2019-11-26 02:51:30,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:30,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:30,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:51:30,700 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:30,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:51:30,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086481112] [2019-11-26 02:51:30,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488090827] [2019-11-26 02:51:30,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/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 [2019-11-26 02:51:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:30,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:30,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:51:30,983 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:31,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:51:31,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:31,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-11-26 02:51:31,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828797341] [2019-11-26 02:51:31,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:51:31,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:51:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:51:31,135 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2019-11-26 02:51:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:31,266 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-11-26 02:51:31,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:51:31,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-26 02:51:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:31,268 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:51:31,269 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:51:31,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:51:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:51:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-26 02:51:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:51:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2019-11-26 02:51:31,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 22 [2019-11-26 02:51:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:31,285 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2019-11-26 02:51:31,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:51:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2019-11-26 02:51:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:51:31,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:31,288 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:31,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:31,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 571748771, now seen corresponding path program 2 times [2019-11-26 02:51:31,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:31,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1043747718] [2019-11-26 02:51:31,700 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:31,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:51:31,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:31,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:31,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:51:31,782 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:31,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:51:31,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043747718] [2019-11-26 02:51:31,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68552097] [2019-11-26 02:51:31,963 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/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 [2019-11-26 02:51:32,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:51:32,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:32,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:32,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:51:32,014 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:32,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:51:32,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:32,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-11-26 02:51:32,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963973780] [2019-11-26 02:51:32,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:51:32,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:32,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:51:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:51:32,157 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 9 states. [2019-11-26 02:51:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:32,280 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-11-26 02:51:32,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:51:32,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-26 02:51:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:32,284 INFO L225 Difference]: With dead ends: 48 [2019-11-26 02:51:32,284 INFO L226 Difference]: Without dead ends: 27 [2019-11-26 02:51:32,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:51:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-26 02:51:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-26 02:51:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-26 02:51:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2019-11-26 02:51:32,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 22 [2019-11-26 02:51:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:32,296 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2019-11-26 02:51:32,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:51:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2019-11-26 02:51:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-26 02:51:32,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:32,307 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:32,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:32,709 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -705043475, now seen corresponding path program 3 times [2019-11-26 02:51:32,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:32,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1432325911] [2019-11-26 02:51:32,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:32,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 02:51:32,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:32,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:51:32,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-26 02:51:32,847 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 02:51:33,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432325911] [2019-11-26 02:51:33,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909336407] [2019-11-26 02:51:33,197 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:33,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 02:51:33,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:33,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:51:33,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-26 02:51:33,254 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 02:51:33,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:33,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2019-11-26 02:51:33,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679721121] [2019-11-26 02:51:33,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:51:33,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:51:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:51:33,546 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand 11 states. [2019-11-26 02:51:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:33,846 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2019-11-26 02:51:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:51:33,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-11-26 02:51:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:33,851 INFO L225 Difference]: With dead ends: 77 [2019-11-26 02:51:33,852 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:51:33,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:51:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:51:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-11-26 02:51:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-26 02:51:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 92 transitions. [2019-11-26 02:51:33,883 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 92 transitions. Word has length 34 [2019-11-26 02:51:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:33,883 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 92 transitions. [2019-11-26 02:51:33,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:51:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 92 transitions. [2019-11-26 02:51:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-26 02:51:33,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:33,885 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:34,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:34,293 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2100747161, now seen corresponding path program 4 times [2019-11-26 02:51:34,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:34,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1068065228] [2019-11-26 02:51:34,294 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:34,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:51:34,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:34,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:51:34,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-26 02:51:34,380 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:34,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:34,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-26 02:51:34,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1068065228] [2019-11-26 02:51:34,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283140793] [2019-11-26 02:51:34,639 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:34,688 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:51:34,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:34,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:51:34,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-26 02:51:34,697 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:34,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:34,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-26 02:51:34,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:34,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9] total 11 [2019-11-26 02:51:34,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809253473] [2019-11-26 02:51:34,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:51:34,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:51:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:51:34,945 INFO L87 Difference]: Start difference. First operand 46 states and 92 transitions. Second operand 11 states. [2019-11-26 02:51:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:35,144 INFO L93 Difference]: Finished difference Result 95 states and 230 transitions. [2019-11-26 02:51:35,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:51:35,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-11-26 02:51:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:35,150 INFO L225 Difference]: With dead ends: 95 [2019-11-26 02:51:35,150 INFO L226 Difference]: Without dead ends: 50 [2019-11-26 02:51:35,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:51:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-26 02:51:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-26 02:51:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:51:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 95 transitions. [2019-11-26 02:51:35,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 95 transitions. Word has length 34 [2019-11-26 02:51:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:35,180 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 95 transitions. [2019-11-26 02:51:35,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:51:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 95 transitions. [2019-11-26 02:51:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-26 02:51:35,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:35,188 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:35,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:35,590 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1503930969, now seen corresponding path program 5 times [2019-11-26 02:51:35,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:35,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [302123516] [2019-11-26 02:51:35,591 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:35,660 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-11-26 02:51:35,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:35,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:51:35,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-26 02:51:35,732 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-26 02:51:36,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302123516] [2019-11-26 02:51:36,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-26 02:51:36,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2019-11-26 02:51:36,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110862894] [2019-11-26 02:51:36,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:51:36,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:51:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:51:36,438 INFO L87 Difference]: Start difference. First operand 50 states and 95 transitions. Second operand 6 states. [2019-11-26 02:51:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:36,560 INFO L93 Difference]: Finished difference Result 84 states and 171 transitions. [2019-11-26 02:51:36,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:51:36,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-11-26 02:51:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:36,567 INFO L225 Difference]: With dead ends: 84 [2019-11-26 02:51:36,567 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:51:36,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:51:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:51:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:51:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:51:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2019-11-26 02:51:36,575 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 46 [2019-11-26 02:51:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:36,575 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2019-11-26 02:51:36,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:51:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2019-11-26 02:51:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-26 02:51:36,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:36,581 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:36,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:36,784 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1974214584, now seen corresponding path program 6 times [2019-11-26 02:51:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:36,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1584455739] [2019-11-26 02:51:36,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:36,860 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-26 02:51:36,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:36,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:36,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-26 02:51:36,908 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:37,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-26 02:51:37,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1584455739] [2019-11-26 02:51:37,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959324972] [2019-11-26 02:51:37,153 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:37,191 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-26 02:51:37,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:51:37,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:51:37,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-26 02:51:37,200 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:37,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-26 02:51:37,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:37,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-11-26 02:51:37,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225580637] [2019-11-26 02:51:37,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:51:37,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:51:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:51:37,415 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand 9 states. [2019-11-26 02:51:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:37,568 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-11-26 02:51:37,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:51:37,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-26 02:51:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:37,570 INFO L225 Difference]: With dead ends: 40 [2019-11-26 02:51:37,570 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:51:37,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:51:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:51:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:51:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:51:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2019-11-26 02:51:37,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 47 [2019-11-26 02:51:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:37,577 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2019-11-26 02:51:37,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:51:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2019-11-26 02:51:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-26 02:51:37,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:37,579 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 10, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:37,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:37,987 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1709057054, now seen corresponding path program 7 times [2019-11-26 02:51:37,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:37,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1890985819] [2019-11-26 02:51:37,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:38,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:51:38,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-26 02:51:38,116 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:38,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:38,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:38,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-26 02:51:38,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890985819] [2019-11-26 02:51:38,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35321462] [2019-11-26 02:51:38,659 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:51:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:51:38,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:51:38,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:51:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-26 02:51:38,725 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:51:38,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:39,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:39,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:51:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-26 02:51:39,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:51:39,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11] total 13 [2019-11-26 02:51:39,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914445359] [2019-11-26 02:51:39,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:51:39,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:51:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:51:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:51:39,059 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 13 states. [2019-11-26 02:51:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:51:39,259 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2019-11-26 02:51:39,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:51:39,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2019-11-26 02:51:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:51:39,261 INFO L225 Difference]: With dead ends: 81 [2019-11-26 02:51:39,261 INFO L226 Difference]: Without dead ends: 47 [2019-11-26 02:51:39,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:51:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-26 02:51:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-26 02:51:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:51:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2019-11-26 02:51:39,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 85 [2019-11-26 02:51:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:51:39,269 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2019-11-26 02:51:39,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:51:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2019-11-26 02:51:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-26 02:51:39,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:51:39,271 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-26 02:51:39,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:39,677 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:51:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:51:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1736681501, now seen corresponding path program 8 times [2019-11-26 02:51:39,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:51:39,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2059886608] [2019-11-26 02:51:39,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:39,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:51:39,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:51:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:51:39,936 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:51:39,936 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:51:40,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:51:40,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:51:40 BoogieIcfgContainer [2019-11-26 02:51:40,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:51:40,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:51:40,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:51:40,175 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:51:40,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:51:29" (3/4) ... [2019-11-26 02:51:40,177 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:51:40,257 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ba30aa6e-dbf6-469e-92bb-c4a4e26a49c1/bin/utaipan/witness.graphml [2019-11-26 02:51:40,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:51:40,259 INFO L168 Benchmark]: Toolchain (without parser) took 11537.83 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 292.6 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -165.4 MB). Peak memory consumption was 127.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,259 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:51:40,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.05 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,260 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.64 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:51:40,260 INFO L168 Benchmark]: Boogie Preprocessor took 79.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,261 INFO L168 Benchmark]: RCFGBuilder took 191.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,261 INFO L168 Benchmark]: TraceAbstraction took 10899.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 185.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -50.3 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,262 INFO L168 Benchmark]: Witness Printer took 83.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:51:40,263 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.05 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.64 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 191.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10899.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 185.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -50.3 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. * Witness Printer took 83.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 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, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 10.8s, OverallIterations: 10, TraceHistogramMax: 15, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 159 SDslu, 375 SDs, 0 SdLazy, 607 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 1024 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, 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, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 662 NumberOfCodeBlocks, 569 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 134345 SizeOfPredicates, 48 NumberOfNonLiveVariables, 678 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 1854/2714 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...