./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be --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 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.1-dev-e943c26 [2021-10-21 19:46:04,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:46:04,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:46:04,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:46:04,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:46:04,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:46:04,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:46:04,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:46:04,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:46:04,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:46:04,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:46:04,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:46:04,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:46:04,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:46:04,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:46:04,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:46:04,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:46:04,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:46:04,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:46:04,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:46:04,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:46:04,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:46:04,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:46:04,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:46:04,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:46:04,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:46:04,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:46:04,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:46:04,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:46:04,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:46:04,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:46:04,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:46:04,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:46:04,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:46:04,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:46:04,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:46:04,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:46:04,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:46:04,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:46:04,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:46:04,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:46:04,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:46:04,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:46:04,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:46:04,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:46:04,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:46:04,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:46:04,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:46:04,537 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:46:04,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:46:04,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:46:04,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:46:04,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:46:04,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:46:04,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:46:04,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:46:04,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:46:04,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:46:04,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:46:04,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:46:04,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:46:04,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:46:04,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:46:04,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:46:04,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:46:04,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:46:04,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:46:04,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:46:04,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:46:04,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:46:04,543 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:46:04,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:46:04,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:46:04,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:46:04,545 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_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2021-10-21 19:46:04,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:46:04,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:46:04,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:46:04,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:46:04,851 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:46:04,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/recursive/Fibonacci04.c [2021-10-21 19:46:04,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/data/dc886720f/57c7fe07039f4f6983b9eddb459c47a4/FLAG1c3b7a0bd [2021-10-21 19:46:05,481 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:46:05,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/sv-benchmarks/c/recursive/Fibonacci04.c [2021-10-21 19:46:05,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/data/dc886720f/57c7fe07039f4f6983b9eddb459c47a4/FLAG1c3b7a0bd [2021-10-21 19:46:05,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/data/dc886720f/57c7fe07039f4f6983b9eddb459c47a4 [2021-10-21 19:46:05,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:46:05,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:46:05,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:46:05,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:46:05,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:46:05,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:46:05" (1/1) ... [2021-10-21 19:46:05,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fc9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:05, skipping insertion in model container [2021-10-21 19:46:05,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:46:05" (1/1) ... [2021-10-21 19:46:05,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:46:05,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:46:06,095 WARN L228 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_681d5551-1005-4ffd-bfb4-da04b90978a3/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-10-21 19:46:06,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:46:06,108 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:46:06,124 WARN L228 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_681d5551-1005-4ffd-bfb4-da04b90978a3/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-10-21 19:46:06,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:46:06,144 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:46:06,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06 WrapperNode [2021-10-21 19:46:06,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:46:06,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:46:06,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:46:06,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:46:06,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:46:06,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:46:06,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:46:06,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:46:06,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:46:06,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:46:06,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:46:06,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:46:06,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (1/1) ... [2021-10-21 19:46:06,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:46:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:06,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:46:06,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:46:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-10-21 19:46:06,299 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-10-21 19:46:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:46:06,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:46:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:46:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:46:06,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:46:06,488 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:46:06,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:06 BoogieIcfgContainer [2021-10-21 19:46:06,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:46:06,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:46:06,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:46:06,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:46:06,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:46:05" (1/3) ... [2021-10-21 19:46:06,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490a4899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:46:06, skipping insertion in model container [2021-10-21 19:46:06,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:06" (2/3) ... [2021-10-21 19:46:06,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490a4899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:46:06, skipping insertion in model container [2021-10-21 19:46:06,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:06" (3/3) ... [2021-10-21 19:46:06,500 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2021-10-21 19:46:06,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:46:06,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:46:06,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:46:06,604 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 [2021-10-21 19:46:06,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:46:06,632 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) [2021-10-21 19:46:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:46:06,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:06,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:06,655 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 117289724, now seen corresponding path program 1 times [2021-10-21 19:46:06,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:06,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395329780] [2021-10-21 19:46:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:06,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:46:07,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:07,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395329780] [2021-10-21 19:46:07,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395329780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:07,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:07,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:46:07,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735625923] [2021-10-21 19:46:07,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:46:07,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:46:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:46:07,088 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) [2021-10-21 19:46:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:07,201 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-10-21 19:46:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:46:07,204 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 [2021-10-21 19:46:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:07,214 INFO L225 Difference]: With dead ends: 31 [2021-10-21 19:46:07,215 INFO L226 Difference]: Without dead ends: 18 [2021-10-21 19:46:07,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:46:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-21 19:46:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-21 19:46:07,263 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) [2021-10-21 19:46:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-21 19:46:07,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-10-21 19:46:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:07,268 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-21 19:46:07,268 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) [2021-10-21 19:46:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-21 19:46:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:46:07,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:07,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:07,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:46:07,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 36927066, now seen corresponding path program 1 times [2021-10-21 19:46:07,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:07,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312831660] [2021-10-21 19:46:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:07,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:46:07,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:07,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312831660] [2021-10-21 19:46:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312831660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:07,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:07,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:46:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400128832] [2021-10-21 19:46:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:46:07,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:46:07,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:46:07,404 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) [2021-10-21 19:46:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:07,446 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-10-21 19:46:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:46:07,447 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 [2021-10-21 19:46:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:07,448 INFO L225 Difference]: With dead ends: 24 [2021-10-21 19:46:07,448 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:46:07,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:46:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:46:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-10-21 19:46:07,454 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) [2021-10-21 19:46:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-21 19:46:07,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-10-21 19:46:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:07,456 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-21 19:46:07,456 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) [2021-10-21 19:46:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-21 19:46:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:46:07,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:07,458 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:07,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:46:07,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash 703243533, now seen corresponding path program 1 times [2021-10-21 19:46:07,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:07,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506950431] [2021-10-21 19:46:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:07,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:46:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:46:07,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:07,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506950431] [2021-10-21 19:46:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506950431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:07,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865015266] [2021-10-21 19:46:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:07,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:07,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:46:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:07,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:46:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:46:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865015266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:07,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:46:07,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-21 19:46:07,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289101708] [2021-10-21 19:46:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:46:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:46:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:46:07,960 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:46:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:08,047 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-10-21 19:46:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:46:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2021-10-21 19:46:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:08,049 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:46:08,049 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:46:08,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:46:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:46:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 19:46:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:46:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-21 19:46:08,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2021-10-21 19:46:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:08,056 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-21 19:46:08,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:46:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-21 19:46:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:46:08,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:08,059 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:08,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:46:08,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:08,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 187716987, now seen corresponding path program 1 times [2021-10-21 19:46:08,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:08,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841387724] [2021-10-21 19:46:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:08,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:08,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:46:08,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:08,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841387724] [2021-10-21 19:46:08,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841387724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:08,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268607252] [2021-10-21 19:46:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:08,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:08,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:08,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:46:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:46:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:46:08,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268607252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:08,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:46:08,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-21 19:46:08,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208818598] [2021-10-21 19:46:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:46:08,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:46:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:46:08,649 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:46:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:08,766 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-10-21 19:46:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:46:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2021-10-21 19:46:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:08,769 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:46:08,770 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:46:08,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:46:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:46:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-21 19:46:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-10-21 19:46:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-10-21 19:46:08,781 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2021-10-21 19:46:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:08,782 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-10-21 19:46:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:46:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-10-21 19:46:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:46:08,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:08,785 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:08,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:46:08,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:08,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1151618030, now seen corresponding path program 2 times [2021-10-21 19:46:08,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:08,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905531684] [2021-10-21 19:46:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:08,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:46:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:46:09,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:09,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905531684] [2021-10-21 19:46:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905531684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:09,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176022398] [2021-10-21 19:46:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:46:09,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:09,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:09,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:46:09,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:46:09,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:46:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:46:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:46:09,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176022398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:09,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:46:09,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-21 19:46:09,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982307811] [2021-10-21 19:46:09,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:46:09,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:46:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:46:09,524 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:46:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:09,765 INFO L93 Difference]: Finished difference Result 68 states and 103 transitions. [2021-10-21 19:46:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:46:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 37 [2021-10-21 19:46:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:09,768 INFO L225 Difference]: With dead ends: 68 [2021-10-21 19:46:09,772 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:46:09,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:46:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:46:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-21 19:46:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-10-21 19:46:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-10-21 19:46:09,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 37 [2021-10-21 19:46:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:09,788 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-10-21 19:46:09,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:46:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-10-21 19:46:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:46:09,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:09,795 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:46:10,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:10,006 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1673648870, now seen corresponding path program 3 times [2021-10-21 19:46:10,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:10,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471572033] [2021-10-21 19:46:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:10,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:46:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-21 19:46:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-21 19:46:10,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:10,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471572033] [2021-10-21 19:46:10,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471572033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:10,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116358064] [2021-10-21 19:46:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:46:10,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:10,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:10,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:46:10,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:46:10,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:46:10,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:46:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-21 19:46:10,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116358064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:10,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:46:10,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2021-10-21 19:46:10,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221891871] [2021-10-21 19:46:10,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:46:10,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:46:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:46:10,655 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:46:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:10,819 INFO L93 Difference]: Finished difference Result 84 states and 123 transitions. [2021-10-21 19:46:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:46:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 65 [2021-10-21 19:46:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:10,823 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:46:10,823 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 19:46:10,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:46:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 19:46:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-10-21 19:46:10,833 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) [2021-10-21 19:46:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2021-10-21 19:46:10,835 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 65 [2021-10-21 19:46:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2021-10-21 19:46:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:46:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2021-10-21 19:46:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-21 19:46:10,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:10,842 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:10,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:46:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:11,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:11,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1511331526, now seen corresponding path program 4 times [2021-10-21 19:46:11,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:11,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964599327] [2021-10-21 19:46:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:11,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:46:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:46:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-21 19:46:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-21 19:46:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:46:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-21 19:46:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:46:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:46:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-21 19:46:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 320 proven. 96 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2021-10-21 19:46:11,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:11,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964599327] [2021-10-21 19:46:11,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964599327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:11,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114448941] [2021-10-21 19:46:11,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:46:11,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:11,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:11,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:46:11,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:46:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:46:11,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:46:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2021-10-21 19:46:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114448941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:12,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:46:12,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2021-10-21 19:46:12,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544605929] [2021-10-21 19:46:12,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:46:12,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:46:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:46:12,100 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-10-21 19:46:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:12,324 INFO L93 Difference]: Finished difference Result 105 states and 174 transitions. [2021-10-21 19:46:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:46:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 147 [2021-10-21 19:46:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:12,331 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:46:12,331 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:46:12,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:46:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:46:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-21 19:46:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-21 19:46:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-10-21 19:46:12,343 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 147 [2021-10-21 19:46:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-10-21 19:46:12,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-10-21 19:46:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-10-21 19:46:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-21 19:46:12,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:12,348 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:12,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:46:12,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:12,566 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:46:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2094125593, now seen corresponding path program 5 times [2021-10-21 19:46:12,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:12,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060187013] [2021-10-21 19:46:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:12,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:46:12,594 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:46:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:46:12,668 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:46:12,668 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:46:12,669 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:46:12,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:46:12,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:46:12,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:46:12 BoogieIcfgContainer [2021-10-21 19:46:12,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:46:12,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:46:12,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:46:12,795 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:46:12,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:06" (3/4) ... [2021-10-21 19:46:12,797 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:46:12,895 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:46:12,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:46:12,897 INFO L168 Benchmark]: Toolchain (without parser) took 7050.41 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 72.3 MB in the beginning and 77.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,898 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:46:12,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.74 ms. Allocated memory is still 111.1 MB. Free memory was 72.1 MB in the beginning and 87.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 111.1 MB. Free memory was 87.1 MB in the beginning and 85.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,899 INFO L168 Benchmark]: Boogie Preprocessor took 18.45 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 84.9 MB in the end (delta: 985.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:46:12,900 INFO L168 Benchmark]: RCFGBuilder took 290.68 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 75.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,900 INFO L168 Benchmark]: TraceAbstraction took 6302.88 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 75.2 MB in the beginning and 83.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,901 INFO L168 Benchmark]: Witness Printer took 100.85 ms. Allocated memory is still 142.6 MB. Free memory was 83.9 MB in the beginning and 77.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:12,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.74 ms. Allocated memory is still 111.1 MB. Free memory was 72.1 MB in the beginning and 87.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 111.1 MB. Free memory was 87.1 MB in the beginning and 85.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.45 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 84.9 MB in the end (delta: 985.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 290.68 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 75.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6302.88 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 75.2 MB in the beginning and 83.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. * Witness Printer took 100.85 ms. Allocated memory is still 142.6 MB. Free memory was 83.9 MB in the beginning and 77.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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) [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) [L35] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6083.2ms, OverallIterations: 8, TraceHistogramMax: 21, EmptinessCheckTime: 54.9ms, AutomataDifference: 1072.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 116 SDtfs, 198 SDslu, 319 SDs, 0 SdLazy, 598 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 480.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 453 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 590.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 108.7ms SsaConstructionTime, 347.0ms SatisfiabilityAnalysisTime, 2695.5ms InterpolantComputationTime, 719 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 1107 SizeOfPredicates, 15 NumberOfNonLiveVariables, 672 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2448/2834 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! [2021-10-21 19:46:12,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681d5551-1005-4ffd-bfb4-da04b90978a3/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...