./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.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_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-11-25 08:54:22,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:54:22,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:54:22,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:54:22,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:54:22,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:54:22,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:54:22,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:54:22,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:54:22,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:54:22,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:54:22,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:54:22,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:54:22,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:54:22,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:54:22,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:54:22,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:54:22,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:54:22,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:54:22,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:54:22,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:54:22,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:54:22,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:54:22,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:54:22,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:54:22,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:54:22,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:54:22,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:54:22,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:54:22,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:54:22,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:54:22,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:54:22,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:54:22,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:54:22,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:54:22,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:54:22,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:54:22,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:54:22,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:54:22,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:54:22,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:54:22,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:54:22,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:54:22,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:54:22,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:54:22,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:54:22,404 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:54:22,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:54:22,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:54:22,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:54:22,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:54:22,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:54:22,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:54:22,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:54:22,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:54:22,406 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:54:22,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:54:22,407 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:54:22,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:54:22,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:54:22,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:54:22,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:54:22,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:54:22,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:54:22,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:54:22,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:54:22,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:54:22,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:54:22,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:54:22,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:54:22,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d [2019-11-25 08:54:22,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:54:22,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:54:22,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:54:22,560 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:54:22,560 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:54:22,561 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-11-25 08:54:22,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/data/49cba9f62/62cfec55adb542fe823aa6cc343a3c3d/FLAGa4863329f [2019-11-25 08:54:23,014 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:54:23,015 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-11-25 08:54:23,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/data/49cba9f62/62cfec55adb542fe823aa6cc343a3c3d/FLAGa4863329f [2019-11-25 08:54:23,032 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/data/49cba9f62/62cfec55adb542fe823aa6cc343a3c3d [2019-11-25 08:54:23,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:54:23,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:54:23,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:23,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:54:23,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:54:23,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa84e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23, skipping insertion in model container [2019-11-25 08:54:23,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:54:23,071 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:54:23,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:23,250 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:54:23,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:23,383 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:54:23,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23 WrapperNode [2019-11-25 08:54:23,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:23,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:23,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:54:23,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:54:23,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:23,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:54:23,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:54:23,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:54:23,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... [2019-11-25 08:54:23,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:54:23,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:54:23,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:54:23,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:54:23,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:54:23,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:54:23,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:54:23,505 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-25 08:54:23,506 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-25 08:54:23,507 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-25 08:54:23,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-25 08:54:23,675 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:54:23,675 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:54:23,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:23 BoogieIcfgContainer [2019-11-25 08:54:23,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:54:23,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:54:23,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:54:23,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:54:23,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:54:23" (1/3) ... [2019-11-25 08:54:23,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3802da62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:23, skipping insertion in model container [2019-11-25 08:54:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:23" (2/3) ... [2019-11-25 08:54:23,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3802da62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:23, skipping insertion in model container [2019-11-25 08:54:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:23" (3/3) ... [2019-11-25 08:54:23,683 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2019-11-25 08:54:23,692 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:54:23,697 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:54:23,708 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:54:23,735 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:54:23,735 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:54:23,735 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:54:23,735 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:54:23,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:54:23,735 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:54:23,736 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:54:23,736 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:54:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:54:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:54:23,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:23,762 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:23,762 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-25 08:54:23,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:23,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710432227] [2019-11-25 08:54:23,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:23,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710432227] [2019-11-25 08:54:23,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:23,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:54:23,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617282188] [2019-11-25 08:54:23,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:54:23,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:24,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:54:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:24,007 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-25 08:54:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:24,122 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-25 08:54:24,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:24,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-25 08:54:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:24,132 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:54:24,132 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:54:24,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:54:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:54:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:54:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:54:24,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-25 08:54:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:24,171 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:54:24,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:54:24,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:54:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:54:24,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:24,172 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:24,172 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-25 08:54:24,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:24,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649947181] [2019-11-25 08:54:24,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:24,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649947181] [2019-11-25 08:54:24,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:24,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:54:24,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032566423] [2019-11-25 08:54:24,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:54:24,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:54:24,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:24,245 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-25 08:54:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:24,328 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-25 08:54:24,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:24,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-25 08:54:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:24,330 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:54:24,330 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:54:24,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:54:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-25 08:54:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:54:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:54:24,339 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-25 08:54:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:24,339 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:54:24,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:54:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:54:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:54:24,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:24,341 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:24,341 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-25 08:54:24,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:24,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836443093] [2019-11-25 08:54:24,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:54:24,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836443093] [2019-11-25 08:54:24,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161320542] [2019-11-25 08:54:24,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:24,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:24,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:54:24,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:24,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-25 08:54:24,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245654343] [2019-11-25 08:54:24,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:24,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:24,654 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-25 08:54:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:24,827 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-25 08:54:24,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:54:24,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-25 08:54:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:24,829 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:54:24,830 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:54:24,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:54:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:54:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-25 08:54:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:54:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-25 08:54:24,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-25 08:54:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:24,840 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-25 08:54:24,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-25 08:54:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:54:24,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:24,842 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:25,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:25,047 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-25 08:54:25,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:25,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872566856] [2019-11-25 08:54:25,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:54:25,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872566856] [2019-11-25 08:54:25,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491839390] [2019-11-25 08:54:25,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:25,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:54:25,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:25,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-25 08:54:25,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653961805] [2019-11-25 08:54:25,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:25,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:25,270 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-25 08:54:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:25,526 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-25 08:54:25,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:54:25,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-25 08:54:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:25,531 INFO L225 Difference]: With dead ends: 55 [2019-11-25 08:54:25,531 INFO L226 Difference]: Without dead ends: 51 [2019-11-25 08:54:25,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:54:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-25 08:54:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-25 08:54:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:54:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-25 08:54:25,562 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-25 08:54:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:25,563 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-25 08:54:25,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-25 08:54:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:54:25,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:25,570 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:25,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:25,778 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-25 08:54:25,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:25,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605356608] [2019-11-25 08:54:25,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:54:26,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605356608] [2019-11-25 08:54:26,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463919679] [2019-11-25 08:54:26,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:26,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:54:26,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:26,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-25 08:54:26,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927584619] [2019-11-25 08:54:26,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:54:26,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:54:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:54:26,130 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-25 08:54:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:26,576 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-25 08:54:26,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:54:26,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-25 08:54:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:26,580 INFO L225 Difference]: With dead ends: 114 [2019-11-25 08:54:26,580 INFO L226 Difference]: Without dead ends: 68 [2019-11-25 08:54:26,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:54:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-25 08:54:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-25 08:54:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:54:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-25 08:54:26,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-25 08:54:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:26,597 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-25 08:54:26,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:54:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-25 08:54:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-25 08:54:26,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:26,600 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:26,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:26,803 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-25 08:54:26,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:26,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465128662] [2019-11-25 08:54:26,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:54:26,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465128662] [2019-11-25 08:54:26,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707229038] [2019-11-25 08:54:26,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:26,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:26,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:54:27,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:27,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-25 08:54:27,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8360909] [2019-11-25 08:54:27,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:54:27,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:54:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:54:27,085 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-25 08:54:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:27,358 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-25 08:54:27,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:54:27,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-25 08:54:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:27,361 INFO L225 Difference]: With dead ends: 147 [2019-11-25 08:54:27,361 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:54:27,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:54:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:54:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-25 08:54:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:54:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-25 08:54:27,387 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-25 08:54:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:27,387 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-25 08:54:27,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:54:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-25 08:54:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-25 08:54:27,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:27,398 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:27,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:27,598 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-25 08:54:27,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:27,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693444302] [2019-11-25 08:54:27,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-25 08:54:27,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693444302] [2019-11-25 08:54:27,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446693022] [2019-11-25 08:54:27,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:27,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:27,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-25 08:54:27,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:27,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2019-11-25 08:54:27,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985175678] [2019-11-25 08:54:27,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:54:27,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:54:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:54:27,913 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 17 states. [2019-11-25 08:54:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:28,232 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-11-25 08:54:28,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:54:28,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-25 08:54:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:28,236 INFO L225 Difference]: With dead ends: 163 [2019-11-25 08:54:28,236 INFO L226 Difference]: Without dead ends: 99 [2019-11-25 08:54:28,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:54:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-25 08:54:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-11-25 08:54:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-25 08:54:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-11-25 08:54:28,274 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-11-25 08:54:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:28,275 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-11-25 08:54:28,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:54:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-11-25 08:54:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:54:28,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:28,278 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:28,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:28,479 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-11-25 08:54:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:28,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140282862] [2019-11-25 08:54:28,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-25 08:54:28,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140282862] [2019-11-25 08:54:28,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255344357] [2019-11-25 08:54:28,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:28,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:28,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-25 08:54:28,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:28,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-11-25 08:54:28,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885911213] [2019-11-25 08:54:28,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:54:28,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:54:28,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:54:28,763 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-11-25 08:54:29,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:29,049 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-11-25 08:54:29,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:54:29,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-25 08:54:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:29,051 INFO L225 Difference]: With dead ends: 182 [2019-11-25 08:54:29,051 INFO L226 Difference]: Without dead ends: 91 [2019-11-25 08:54:29,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:54:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-25 08:54:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-25 08:54:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-25 08:54:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-11-25 08:54:29,066 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-11-25 08:54:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:29,066 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-11-25 08:54:29,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:54:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-11-25 08:54:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-25 08:54:29,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:29,068 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:29,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:29,272 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash 629760405, now seen corresponding path program 2 times [2019-11-25 08:54:29,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:29,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591050344] [2019-11-25 08:54:29,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-25 08:54:29,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591050344] [2019-11-25 08:54:29,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766684065] [2019-11-25 08:54:29,594 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:29,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:54:29,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:54:29,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:54:29,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-25 08:54:29,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:29,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2019-11-25 08:54:29,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595444089] [2019-11-25 08:54:29,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:54:29,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:54:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:54:29,760 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-11-25 08:54:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:30,215 INFO L93 Difference]: Finished difference Result 189 states and 316 transitions. [2019-11-25 08:54:30,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:54:30,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2019-11-25 08:54:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:30,217 INFO L225 Difference]: With dead ends: 189 [2019-11-25 08:54:30,217 INFO L226 Difference]: Without dead ends: 100 [2019-11-25 08:54:30,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:54:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-25 08:54:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2019-11-25 08:54:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-25 08:54:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2019-11-25 08:54:30,232 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 78 [2019-11-25 08:54:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:30,234 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2019-11-25 08:54:30,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:54:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2019-11-25 08:54:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-25 08:54:30,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:30,236 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:30,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:30,439 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-11-25 08:54:30,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:30,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505599360] [2019-11-25 08:54:30,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:30,474 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:30,474 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:54:30,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:54:30 BoogieIcfgContainer [2019-11-25 08:54:30,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:54:30,513 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:54:30,513 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:54:30,514 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:54:30,514 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:23" (3/4) ... [2019-11-25 08:54:30,516 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:54:30,579 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ec49a181-a8b0-419a-ae0e-cc53f7121db5/bin/uautomizer/witness.graphml [2019-11-25 08:54:30,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:54:30,581 INFO L168 Benchmark]: Toolchain (without parser) took 7544.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 219.2 MB). Free memory was 952.9 MB in the beginning and 1.0 GB in the end (delta: -55.0 MB). Peak memory consumption was 164.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,581 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:54:30,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 952.9 MB in the beginning and 1.2 GB in the end (delta: -241.1 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,583 INFO L168 Benchmark]: Boogie Preprocessor took 24.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:54:30,583 INFO L168 Benchmark]: RCFGBuilder took 233.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,584 INFO L168 Benchmark]: TraceAbstraction took 6835.69 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.5 MB). Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 163.1 MB). Peak memory consumption was 185.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,584 INFO L168 Benchmark]: Witness Printer took 65.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:30,587 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 348.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 952.9 MB in the beginning and 1.2 GB in the end (delta: -241.1 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 233.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6835.69 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.5 MB). Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 163.1 MB). Peak memory consumption was 185.7 MB. Max. memory is 11.5 GB. * Witness Printer took 65.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 3 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.7s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 383 SDslu, 1378 SDs, 0 SdLazy, 2102 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 55 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 593 ConstructedInterpolants, 0 QuantifiedInterpolants, 60425 SizeOfPredicates, 25 NumberOfNonLiveVariables, 676 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 378/526 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...