./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bbff91fb2bcbd238fb97db06c7d4983c05a850 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-29 19:39:26,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:39:26,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:39:26,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:39:26,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:39:26,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:39:26,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:39:26,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:39:26,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:39:26,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:39:26,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:39:26,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:39:26,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:39:26,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:39:26,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:39:26,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:39:26,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:39:26,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:39:26,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:39:26,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:39:26,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:39:26,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:39:26,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:39:26,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:39:26,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:39:26,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:39:26,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:39:26,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:39:26,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:39:26,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:39:26,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:39:26,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:39:26,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:39:26,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:39:26,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:39:26,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:39:26,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:39:26,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:39:26,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:39:26,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:39:26,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:39:26,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:39:26,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:39:26,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:39:26,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:39:26,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:39:26,523 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:39:26,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:39:26,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:39:26,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:39:26,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:39:26,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:39:26,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:39:26,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:39:26,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:39:26,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:39:26,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:39:26,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:39:26,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:39:26,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:39:26,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:39:26,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:39:26,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:39:26,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:39:26,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:39:26,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:39:26,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:39:26,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:39:26,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:39:26,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:39:26,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:39:26,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2020-11-29 19:39:26,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:39:26,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:39:26,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:39:26,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:39:26,867 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:39:26,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-29 19:39:26,994 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/data/d564457a6/fb1f3e40d2c24533a361030673f85d69/FLAGc6cfcec2e [2020-11-29 19:39:27,500 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:39:27,501 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-29 19:39:27,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/data/d564457a6/fb1f3e40d2c24533a361030673f85d69/FLAGc6cfcec2e [2020-11-29 19:39:27,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/data/d564457a6/fb1f3e40d2c24533a361030673f85d69 [2020-11-29 19:39:27,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:39:27,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:39:27,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:39:27,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:39:27,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:39:27,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:39:27" (1/1) ... [2020-11-29 19:39:27,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc18980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:27, skipping insertion in model container [2020-11-29 19:39:27,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:39:27" (1/1) ... [2020-11-29 19:39:27,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:39:27,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:39:28,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:39:28,177 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:39:28,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:39:28,208 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:39:28,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28 WrapperNode [2020-11-29 19:39:28,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:39:28,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:39:28,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:39:28,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:39:28,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:39:28,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:39:28,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:39:28,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:39:28,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... [2020-11-29 19:39:28,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:39:28,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:39:28,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:39:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:39:28,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:28,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:39:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-29 19:39:28,348 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-29 19:39:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:39:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-29 19:39:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-29 19:39:28,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:39:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:39:28,802 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:39:28,802 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:39:28,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:39:28 BoogieIcfgContainer [2020-11-29 19:39:28,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:39:28,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:39:28,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:39:28,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:39:28,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:39:27" (1/3) ... [2020-11-29 19:39:28,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddef537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:39:28, skipping insertion in model container [2020-11-29 19:39:28,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:39:28" (2/3) ... [2020-11-29 19:39:28,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddef537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:39:28, skipping insertion in model container [2020-11-29 19:39:28,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:39:28" (3/3) ... [2020-11-29 19:39:28,818 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-11-29 19:39:28,836 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:39:28,840 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:39:28,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:39:28,873 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:39:28,873 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:39:28,873 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:39:28,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:39:28,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:39:28,874 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:39:28,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:39:28,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:39:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-29 19:39:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:39:28,898 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:28,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:28,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:28,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-29 19:39:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155400901] [2020-11-29 19:39:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:39:29,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155400901] [2020-11-29 19:39:29,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:39:29,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:39:29,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043487304] [2020-11-29 19:39:29,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:39:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:39:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:39:29,163 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-29 19:39:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:29,243 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-29 19:39:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:39:29,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 19:39:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:29,257 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:39:29,257 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:39:29,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:39:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:39:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:39:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:39:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 19:39:29,294 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-29 19:39:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 19:39:29,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:39:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 19:39:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:39:29,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:29,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:29,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:39:29,297 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-29 19:39:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:29,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703471502] [2020-11-29 19:39:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:39:29,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703471502] [2020-11-29 19:39:29,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:39:29,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:39:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688392043] [2020-11-29 19:39:29,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:39:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:39:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:39:29,431 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-29 19:39:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:29,462 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-29 19:39:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:39:29,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 19:39:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:29,464 INFO L225 Difference]: With dead ends: 33 [2020-11-29 19:39:29,464 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:39:29,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:39:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:39:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-29 19:39:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:39:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 19:39:29,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-29 19:39:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:29,473 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 19:39:29,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:39:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 19:39:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:39:29,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:29,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:29,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:39:29,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:29,476 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-29 19:39:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706939797] [2020-11-29 19:39:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 19:39:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:39:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706939797] [2020-11-29 19:39:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310213641] [2020-11-29 19:39:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:39:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:39:29,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:29,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-29 19:39:29,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251574529] [2020-11-29 19:39:29,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:39:29,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:39:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:39:29,833 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-29 19:39:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:30,079 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-29 19:39:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:39:30,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-29 19:39:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:30,081 INFO L225 Difference]: With dead ends: 55 [2020-11-29 19:39:30,081 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:39:30,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:39:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:39:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-29 19:39:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:39:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-29 19:39:30,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-29 19:39:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:30,100 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-29 19:39:30,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:39:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-29 19:39:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:39:30,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:30,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 19:39:30,322 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-29 19:39:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728157374] [2020-11-29 19:39:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:30,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:39:30,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728157374] [2020-11-29 19:39:30,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262371525] [2020-11-29 19:39:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:39:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:39:30,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:30,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-29 19:39:30,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339673057] [2020-11-29 19:39:30,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:39:30,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:39:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:39:30,632 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-29 19:39:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:30,862 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-29 19:39:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:39:30,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-29 19:39:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:30,867 INFO L225 Difference]: With dead ends: 51 [2020-11-29 19:39:30,867 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:39:30,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:39:30,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:39:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-29 19:39:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 19:39:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-29 19:39:30,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-29 19:39:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:30,895 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-29 19:39:30,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:39:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-29 19:39:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 19:39:30,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:30,907 INFO L422 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] [2020-11-29 19:39:31,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:39:31,110 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-29 19:39:31,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867069047] [2020-11-29 19:39:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 19:39:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 19:39:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 19:39:31,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867069047] [2020-11-29 19:39:31,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099124108] [2020-11-29 19:39:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:39:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 19:39:31,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:31,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-29 19:39:31,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700476770] [2020-11-29 19:39:31,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:39:31,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:31,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:39:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:39:31,479 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-29 19:39:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:31,842 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-29 19:39:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:39:31,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-29 19:39:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:31,846 INFO L225 Difference]: With dead ends: 105 [2020-11-29 19:39:31,846 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 19:39:31,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:39:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 19:39:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 19:39:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 19:39:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-29 19:39:31,875 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-29 19:39:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:31,876 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-29 19:39:31,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:39:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-29 19:39:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 19:39:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:31,878 INFO L422 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, 1] [2020-11-29 19:39:32,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:39:32,102 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-29 19:39:32,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:32,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733918665] [2020-11-29 19:39:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 19:39:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 19:39:32,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733918665] [2020-11-29 19:39:32,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688174158] [2020-11-29 19:39:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:32,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:39:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 19:39:32,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-29 19:39:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968761017] [2020-11-29 19:39:32,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:39:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:32,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:39:32,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:39:32,474 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-29 19:39:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:33,030 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-29 19:39:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:39:33,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-29 19:39:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:33,035 INFO L225 Difference]: With dead ends: 177 [2020-11-29 19:39:33,035 INFO L226 Difference]: Without dead ends: 117 [2020-11-29 19:39:33,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:39:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-29 19:39:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-29 19:39:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 19:39:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-29 19:39:33,070 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-29 19:39:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:33,071 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-29 19:39:33,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:39:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-29 19:39:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 19:39:33,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:33,075 INFO L422 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, 1] [2020-11-29 19:39:33,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:39:33,298 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-29 19:39:33,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:33,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159185271] [2020-11-29 19:39:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 19:39:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:39:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 19:39:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159185271] [2020-11-29 19:39:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880899558] [2020-11-29 19:39:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:39:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-29 19:39:33,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:33,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-11-29 19:39:33,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821861800] [2020-11-29 19:39:33,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:39:33,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:39:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:39:33,696 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 14 states. [2020-11-29 19:39:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:34,386 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-11-29 19:39:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:39:34,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-29 19:39:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:34,392 INFO L225 Difference]: With dead ends: 255 [2020-11-29 19:39:34,392 INFO L226 Difference]: Without dead ends: 155 [2020-11-29 19:39:34,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:39:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-29 19:39:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-11-29 19:39:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 19:39:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-11-29 19:39:34,428 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-11-29 19:39:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:34,428 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-11-29 19:39:34,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:39:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-11-29 19:39:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-29 19:39:34,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:34,436 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:34,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 19:39:34,661 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:34,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:34,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1732889556, now seen corresponding path program 1 times [2020-11-29 19:39:34,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:34,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333280371] [2020-11-29 19:39:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 19:39:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 19:39:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-29 19:39:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:34,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 19:39:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-11-29 19:39:35,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333280371] [2020-11-29 19:39:35,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024358923] [2020-11-29 19:39:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:39:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-11-29 19:39:35,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:35,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-11-29 19:39:35,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996386611] [2020-11-29 19:39:35,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:39:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:39:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:39:35,205 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 14 states. [2020-11-29 19:39:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:35,781 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-11-29 19:39:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:39:35,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-11-29 19:39:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:35,784 INFO L225 Difference]: With dead ends: 241 [2020-11-29 19:39:35,784 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 19:39:35,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:39:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 19:39:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-11-29 19:39:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 19:39:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-11-29 19:39:35,822 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 93 [2020-11-29 19:39:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:35,823 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-11-29 19:39:35,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:39:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-11-29 19:39:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-29 19:39:35,827 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:35,827 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:36,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:39:36,048 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:36,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1676450270, now seen corresponding path program 2 times [2020-11-29 19:39:36,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:36,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602387753] [2020-11-29 19:39:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:39:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 19:39:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 19:39:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-29 19:39:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:39:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:39:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:39:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-29 19:39:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602387753] [2020-11-29 19:39:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405833049] [2020-11-29 19:39:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/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 [2020-11-29 19:39:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:39:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:39:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:39:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:39:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-29 19:39:36,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:39:36,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2020-11-29 19:39:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058385039] [2020-11-29 19:39:36,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:39:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:39:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:39:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:39:36,544 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 14 states. [2020-11-29 19:39:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:39:37,032 INFO L93 Difference]: Finished difference Result 212 states and 383 transitions. [2020-11-29 19:39:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:39:37,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-11-29 19:39:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:39:37,036 INFO L225 Difference]: With dead ends: 212 [2020-11-29 19:39:37,036 INFO L226 Difference]: Without dead ends: 123 [2020-11-29 19:39:37,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:39:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-29 19:39:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-11-29 19:39:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-29 19:39:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 183 transitions. [2020-11-29 19:39:37,073 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 183 transitions. Word has length 92 [2020-11-29 19:39:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:39:37,074 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 183 transitions. [2020-11-29 19:39:37,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:39:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 183 transitions. [2020-11-29 19:39:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 19:39:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:39:37,083 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:39:37,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:39:37,297 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:39:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:39:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1836149343, now seen corresponding path program 3 times [2020-11-29 19:39:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:39:37,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518105871] [2020-11-29 19:39:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:39:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:39:37,331 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:39:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:39:37,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:39:37,385 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:39:37,385 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:39:37,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 19:39:37,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:39:37 BoogieIcfgContainer [2020-11-29 19:39:37,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:39:37,488 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:39:37,488 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:39:37,488 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:39:37,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:39:28" (3/4) ... [2020-11-29 19:39:37,490 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:39:37,586 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f7726ab-0615-4c11-ac0a-7d28099f0356/bin/uautomizer/witness.graphml [2020-11-29 19:39:37,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:39:37,596 INFO L168 Benchmark]: Toolchain (without parser) took 9639.84 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 88.7 MB in the beginning and 114.7 MB in the end (delta: -26.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,600 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:39:37,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.95 ms. Allocated memory is still 119.5 MB. Free memory was 88.7 MB in the beginning and 96.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,601 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.23 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 94.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,601 INFO L168 Benchmark]: Boogie Preprocessor took 40.43 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.9 MB in the end (delta: 612.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:39:37,602 INFO L168 Benchmark]: RCFGBuilder took 516.09 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 80.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,603 INFO L168 Benchmark]: TraceAbstraction took 8680.97 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 80.0 MB in the beginning and 120.0 MB in the end (delta: -40.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,603 INFO L168 Benchmark]: Witness Printer took 106.68 ms. Allocated memory is still 174.1 MB. Free memory was 120.0 MB in the beginning and 114.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:39:37,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.95 ms. Allocated memory is still 119.5 MB. Free memory was 88.7 MB in the beginning and 96.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.23 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 94.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.43 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.9 MB in the end (delta: 612.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 516.09 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 80.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8680.97 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 80.0 MB in the beginning and 120.0 MB in the end (delta: -40.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 106.68 ms. Allocated memory is still 174.1 MB. Free memory was 120.0 MB in the beginning and 114.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_2calls_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.5s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 246 SDtfs, 330 SDslu, 1293 SDs, 0 SdLazy, 1911 SolverSat, 332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 586 GetRequests, 458 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 839 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 717 ConstructedInterpolants, 0 QuantifiedInterpolants, 75121 SizeOfPredicates, 27 NumberOfNonLiveVariables, 999 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 729/932 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...