./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa --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 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:36:24,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:36:24,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:36:24,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:36:24,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:36:24,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:36:24,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:36:24,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:36:24,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:36:24,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:36:24,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:36:24,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:36:24,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:36:24,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:36:24,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:36:24,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:36:24,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:36:24,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:36:24,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:36:24,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:36:24,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:36:24,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:36:24,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:36:24,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:36:24,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:36:24,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:36:24,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:36:24,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:36:24,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:36:24,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:36:24,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:36:24,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:36:24,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:36:24,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:36:24,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:36:24,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:36:24,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:36:24,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:36:24,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:36:24,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:36:24,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:36:24,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:36:24,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:36:24,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:36:24,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:36:24,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:36:24,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:36:24,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:36:24,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:36:24,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:36:24,525 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:36:24,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:36:24,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:36:24,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:36:24,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:36:24,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:36:24,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:36:24,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:36:24,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:36:24,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:36:24,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:36:24,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:36:24,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:36:24,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:36:24,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:36:24,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:36:24,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:36:24,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:36:24,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:36:24,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:36:24,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:36:24,533 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_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2021-12-06 19:36:24,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:36:24,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:36:24,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:36:24,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:36:24,747 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:36:24,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive/Fibonacci04.c [2021-12-06 19:36:24,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/data/78b3e0327/0fc0cae2899c4cfe8812856a5474a0e0/FLAGc33019ec2 [2021-12-06 19:36:25,152 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:36:25,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/sv-benchmarks/c/recursive/Fibonacci04.c [2021-12-06 19:36:25,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/data/78b3e0327/0fc0cae2899c4cfe8812856a5474a0e0/FLAGc33019ec2 [2021-12-06 19:36:25,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/data/78b3e0327/0fc0cae2899c4cfe8812856a5474a0e0 [2021-12-06 19:36:25,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:36:25,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:36:25,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:36:25,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:36:25,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:36:25,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253f9c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25, skipping insertion in model container [2021-12-06 19:36:25,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:36:25,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:36:25,331 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-12-06 19:36:25,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:36:25,339 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:36:25,350 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-12-06 19:36:25,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:36:25,360 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:36:25,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25 WrapperNode [2021-12-06 19:36:25,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:36:25,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:36:25,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:36:25,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:36:25,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,382 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2021-12-06 19:36:25,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:36:25,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:36:25,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:36:25,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:36:25,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:36:25,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:36:25,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:36:25,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:36:25,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (1/1) ... [2021-12-06 19:36:25,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:36:25,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:25,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:36:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:36:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-12-06 19:36:25,455 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-12-06 19:36:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:36:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:36:25,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:36:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:36:25,504 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:36:25,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:36:25,567 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:36:25,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:36:25,572 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 19:36:25,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:36:25 BoogieIcfgContainer [2021-12-06 19:36:25,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:36:25,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:36:25,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:36:25,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:36:25,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:36:25" (1/3) ... [2021-12-06 19:36:25,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d635e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:36:25, skipping insertion in model container [2021-12-06 19:36:25,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:36:25" (2/3) ... [2021-12-06 19:36:25,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d635e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:36:25, skipping insertion in model container [2021-12-06 19:36:25,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:36:25" (3/3) ... [2021-12-06 19:36:25,580 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2021-12-06 19:36:25,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:36:25,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:36:25,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:36:25,624 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:36:25,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:36:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:36:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:36:25,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:25,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:25,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 117289724, now seen corresponding path program 1 times [2021-12-06 19:36:25,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:25,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671150021] [2021-12-06 19:36:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:25,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:25,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:25,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671150021] [2021-12-06 19:36:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671150021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:25,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:25,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:36:25,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059531737] [2021-12-06 19:36:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:25,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:36:25,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:36:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:36:25,841 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:36:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:25,906 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-06 19:36:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:36:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-06 19:36:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:25,916 INFO L225 Difference]: With dead ends: 31 [2021-12-06 19:36:25,917 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 19:36:25,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:25,926 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:36:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 19:36:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 19:36:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 19:36:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-06 19:36:25,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-06 19:36:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:25,961 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-06 19:36:25,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:36:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-06 19:36:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:36:25,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:25,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:36:25,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 36927066, now seen corresponding path program 1 times [2021-12-06 19:36:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34826142] [2021-12-06 19:36:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:25,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:36:26,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34826142] [2021-12-06 19:36:26,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34826142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:36:26,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:36:26,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:36:26,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436623747] [2021-12-06 19:36:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:36:26,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:36:26,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:36:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:36:26,023 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:36:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:26,061 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-12-06 19:36:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:36:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-06 19:36:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:26,063 INFO L225 Difference]: With dead ends: 24 [2021-12-06 19:36:26,063 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 19:36:26,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:36:26,065 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:26,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:36:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 19:36:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-12-06 19:36:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 19:36:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-06 19:36:26,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-12-06 19:36:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:26,073 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-06 19:36:26,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:36:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-06 19:36:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 19:36:26,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:26,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:26,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:36:26,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 703243533, now seen corresponding path program 1 times [2021-12-06 19:36:26,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946698135] [2021-12-06 19:36:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:26,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:36:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:36:26,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946698135] [2021-12-06 19:36:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946698135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658363488] [2021-12-06 19:36:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:26,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:26,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:26,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:36:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:36:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:36:26,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:36:26,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658363488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:36:26,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:36:26,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2021-12-06 19:36:26,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825616495] [2021-12-06 19:36:26,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:26,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:36:26,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:36:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:36:26,458 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 19:36:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:26,569 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2021-12-06 19:36:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:36:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 23 [2021-12-06 19:36:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:26,571 INFO L225 Difference]: With dead ends: 46 [2021-12-06 19:36:26,571 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 19:36:26,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:36:26,574 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:26,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:36:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 19:36:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 19:36:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-06 19:36:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-12-06 19:36:26,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 23 [2021-12-06 19:36:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-12-06 19:36:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 19:36:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-12-06 19:36:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:36:26,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:26,585 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:26,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:26,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:26,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1937134450, now seen corresponding path program 1 times [2021-12-06 19:36:26,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:26,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009490207] [2021-12-06 19:36:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:26,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:26,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:36:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 44 proven. 63 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 19:36:27,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009490207] [2021-12-06 19:36:27,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009490207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239859342] [2021-12-06 19:36:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:27,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:27,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:27,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:27,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:36:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:36:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 19:36:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:36:27,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239859342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:36:27,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:36:27,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 18 [2021-12-06 19:36:27,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172297539] [2021-12-06 19:36:27,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:36:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:36:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:36:27,389 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:36:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:27,505 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-12-06 19:36:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:36:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 65 [2021-12-06 19:36:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:27,508 INFO L225 Difference]: With dead ends: 73 [2021-12-06 19:36:27,508 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 19:36:27,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:36:27,511 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:27,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 94 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:36:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 19:36:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-06 19:36:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 19:36:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2021-12-06 19:36:27,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 65 [2021-12-06 19:36:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2021-12-06 19:36:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:36:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2021-12-06 19:36:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 19:36:27,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:27,522 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:27,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:27,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:27,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1961744707, now seen corresponding path program 2 times [2021-12-06 19:36:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:27,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589605527] [2021-12-06 19:36:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:36:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:36:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:36:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:36:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:36:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:36:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:36:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:36:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 85 proven. 119 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-06 19:36:27,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:36:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589605527] [2021-12-06 19:36:27,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589605527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057262694] [2021-12-06 19:36:27,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:36:27,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:27,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:27,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:36:28,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:36:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:36:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 64 proven. 158 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-06 19:36:28,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-06 19:36:28,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057262694] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:36:28,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:36:28,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2021-12-06 19:36:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297178957] [2021-12-06 19:36:28,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:36:28,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:36:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:36:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:36:28,525 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 19:36:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:28,654 INFO L93 Difference]: Finished difference Result 101 states and 150 transitions. [2021-12-06 19:36:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:36:28,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) Word has length 104 [2021-12-06 19:36:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:28,656 INFO L225 Difference]: With dead ends: 101 [2021-12-06 19:36:28,656 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 19:36:28,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:36:28,658 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:28,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 92 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:36:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 19:36:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2021-12-06 19:36:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-06 19:36:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2021-12-06 19:36:28,666 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 104 [2021-12-06 19:36:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:28,666 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2021-12-06 19:36:28,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 19:36:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2021-12-06 19:36:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 19:36:28,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:28,668 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:28,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:36:28,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:28,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:36:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2094125593, now seen corresponding path program 3 times [2021-12-06 19:36:28,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:36:28,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626267048] [2021-12-06 19:36:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:36:28,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:36:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:36:28,950 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:36:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:36:29,048 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:36:29,048 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:36:29,049 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 19:36:29,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:36:29,054 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2021-12-06 19:36:29,058 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:36:29,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:36:29 BoogieIcfgContainer [2021-12-06 19:36:29,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:36:29,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:36:29,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:36:29,101 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:36:29,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:36:25" (3/4) ... [2021-12-06 19:36:29,103 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 19:36:29,157 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:36:29,157 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:36:29,158 INFO L158 Benchmark]: Toolchain (without parser) took 3988.59ms. Allocated memory was 77.6MB in the beginning and 125.8MB in the end (delta: 48.2MB). Free memory was 52.6MB in the beginning and 48.3MB in the end (delta: 4.3MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,158 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:36:29,158 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.47ms. Allocated memory was 77.6MB in the beginning and 104.9MB in the end (delta: 27.3MB). Free memory was 52.5MB in the beginning and 76.1MB in the end (delta: -23.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,159 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.17ms. Allocated memory is still 104.9MB. Free memory was 75.9MB in the beginning and 74.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,159 INFO L158 Benchmark]: Boogie Preprocessor took 14.63ms. Allocated memory is still 104.9MB. Free memory was 74.6MB in the beginning and 73.7MB in the end (delta: 926.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:36:29,160 INFO L158 Benchmark]: RCFGBuilder took 174.39ms. Allocated memory is still 104.9MB. Free memory was 73.7MB in the beginning and 65.0MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,160 INFO L158 Benchmark]: TraceAbstraction took 3524.87ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 51.5MB in the end (delta: 13.1MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,160 INFO L158 Benchmark]: Witness Printer took 56.94ms. Allocated memory is still 125.8MB. Free memory was 51.5MB in the beginning and 48.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 19:36:29,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.47ms. Allocated memory was 77.6MB in the beginning and 104.9MB in the end (delta: 27.3MB). Free memory was 52.5MB in the beginning and 76.1MB in the end (delta: -23.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.17ms. Allocated memory is still 104.9MB. Free memory was 75.9MB in the beginning and 74.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.63ms. Allocated memory is still 104.9MB. Free memory was 74.6MB in the beginning and 73.7MB in the end (delta: 926.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 174.39ms. Allocated memory is still 104.9MB. Free memory was 73.7MB in the beginning and 65.0MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3524.87ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 51.5MB in the end (delta: 13.1MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. * Witness Printer took 56.94ms. Allocated memory is still 125.8MB. Free memory was 51.5MB in the beginning and 48.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); [L31] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L19] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L21] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L21] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L24] return fibonacci(n-1) + fibonacci(n-2); [L31] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L35] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 180 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 169 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 248 mSDsCounter, 173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 507 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 173 mSolverCounterUnsat, 77 mSDtfsCounter, 507 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 499 GetRequests, 421 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 511 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 586 ConstructedInterpolants, 0 QuantifiedInterpolants, 1088 SizeOfPredicates, 10 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 1567/2250 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! [2021-12-06 19:36:29,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a61b2288-d05d-41a2-9722-c8f61bad797c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE