./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_1b.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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/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 de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:21:04,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:21:04,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:21:05,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:21:05,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:21:05,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:21:05,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:21:05,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:21:05,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:21:05,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:21:05,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:21:05,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:21:05,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:21:05,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:21:05,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:21:05,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:21:05,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:21:05,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:21:05,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:21:05,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:21:05,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:21:05,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:21:05,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:21:05,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:21:05,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:21:05,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:21:05,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:21:05,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:21:05,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:21:05,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:21:05,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:21:05,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:21:05,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:21:05,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:21:05,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:21:05,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:21:05,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:21:05,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:21:05,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:21:05,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:21:05,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:21:05,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:21:05,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:21:05,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:21:05,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:21:05,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:21:05,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:21:05,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:21:05,125 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:21:05,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:21:05,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:21:05,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:21:05,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:21:05,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:21:05,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:21:05,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:21:05,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:21:05,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:21:05,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:21:05,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:21:05,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:21:05,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:21:05,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:21:05,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:21:05,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:21:05,129 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:21:05,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:21:05,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:21:05,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:21:05,130 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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 [2021-10-21 20:21:05,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:21:05,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:21:05,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:21:05,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:21:05,466 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:21:05,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-21 20:21:05,537 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/data/d06270462/f7b646063c2246c8bf956765fe6e68ad/FLAGdcb436c31 [2021-10-21 20:21:05,969 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:21:05,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-21 20:21:05,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/data/d06270462/f7b646063c2246c8bf956765fe6e68ad/FLAGdcb436c31 [2021-10-21 20:21:06,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/data/d06270462/f7b646063c2246c8bf956765fe6e68ad [2021-10-21 20:21:06,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:21:06,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:21:06,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:06,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:21:06,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:21:06,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3109718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06, skipping insertion in model container [2021-10-21 20:21:06,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:21:06,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:21:06,554 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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-21 20:21:06,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:06,572 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:21:06,585 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_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-21 20:21:06,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:06,599 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:21:06,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06 WrapperNode [2021-10-21 20:21:06,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:06,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:06,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:21:06,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:21:06,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:06,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:21:06,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:21:06,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:21:06,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:21:06,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:21:06,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:21:06,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:21:06,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (1/1) ... [2021-10-21 20:21:06,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:21:06,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:06,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:06,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:21:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:21:06,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:21:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:21:06,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:21:06,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:21:06,962 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-21 20:21:06,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:06 BoogieIcfgContainer [2021-10-21 20:21:06,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:21:06,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:21:06,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:21:06,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:21:06,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:21:06" (1/3) ... [2021-10-21 20:21:06,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190aafab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:21:06, skipping insertion in model container [2021-10-21 20:21:06,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:06" (2/3) ... [2021-10-21 20:21:06,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190aafab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:21:06, skipping insertion in model container [2021-10-21 20:21:06,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:06" (3/3) ... [2021-10-21 20:21:06,976 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1b.c [2021-10-21 20:21:06,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:21:06,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:21:07,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:21:07,057 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 20:21:07,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:21:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-21 20:21:07,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:07,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-21 20:21:07,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash 28696998, now seen corresponding path program 1 times [2021-10-21 20:21:07,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:07,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507507972] [2021-10-21 20:21:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:07,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:07,262 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 20:21:07,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507507972] [2021-10-21 20:21:07,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507507972] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:21:07,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:21:07,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:21:07,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131389103] [2021-10-21 20:21:07,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:21:07,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:21:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:21:07,286 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:07,310 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-10-21 20:21:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:21:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-21 20:21:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:07,319 INFO L225 Difference]: With dead ends: 20 [2021-10-21 20:21:07,320 INFO L226 Difference]: Without dead ends: 9 [2021-10-21 20:21:07,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:21:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-21 20:21:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-21 20:21:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-21 20:21:07,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-10-21 20:21:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:07,354 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-21 20:21:07,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-21 20:21:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 20:21:07,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:07,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:07,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:21:07,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1809669604, now seen corresponding path program 1 times [2021-10-21 20:21:07,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:07,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688251871] [2021-10-21 20:21:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:07,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:07,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:07,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688251871] [2021-10-21 20:21:07,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688251871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:07,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611978401] [2021-10-21 20:21:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:07,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:07,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:07,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:21:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:21:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611978401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:07,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:07,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 20:21:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31046741] [2021-10-21 20:21:07,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:21:07,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:21:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:21:07,606 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:07,623 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-21 20:21:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:21:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-21 20:21:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:07,624 INFO L225 Difference]: With dead ends: 14 [2021-10-21 20:21:07,624 INFO L226 Difference]: Without dead ends: 11 [2021-10-21 20:21:07,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:21:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-21 20:21:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-21 20:21:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-21 20:21:07,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-21 20:21:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:07,629 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-21 20:21:07,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-21 20:21:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:21:07,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:07,630 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:21:07,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:07,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash -367607134, now seen corresponding path program 2 times [2021-10-21 20:21:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:07,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49595686] [2021-10-21 20:21:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:07,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:07,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:07,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49595686] [2021-10-21 20:21:07,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49595686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:07,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612434104] [2021-10-21 20:21:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:21:07,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:07,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:07,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:21:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:21:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:21:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:08,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612434104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:08,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:08,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 20:21:08,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140267570] [2021-10-21 20:21:08,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:21:08,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:21:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:21:08,074 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:08,105 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-21 20:21:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:21:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-21 20:21:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:08,106 INFO L225 Difference]: With dead ends: 16 [2021-10-21 20:21:08,107 INFO L226 Difference]: Without dead ends: 13 [2021-10-21 20:21:08,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:21:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-21 20:21:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-21 20:21:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-21 20:21:08,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-10-21 20:21:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:08,115 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-21 20:21:08,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-21 20:21:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:21:08,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:08,117 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2021-10-21 20:21:08,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:08,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:08,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1081479200, now seen corresponding path program 3 times [2021-10-21 20:21:08,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:08,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968858712] [2021-10-21 20:21:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:08,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:08,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:08,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968858712] [2021-10-21 20:21:08,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968858712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:08,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755548510] [2021-10-21 20:21:08,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:21:08,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:08,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:08,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:21:08,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:21:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:21:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755548510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:08,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:08,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:21:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852000879] [2021-10-21 20:21:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:21:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:21:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:21:08,586 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:08,617 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-21 20:21:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:21:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-21 20:21:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:08,618 INFO L225 Difference]: With dead ends: 18 [2021-10-21 20:21:08,619 INFO L226 Difference]: Without dead ends: 15 [2021-10-21 20:21:08,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:21:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-21 20:21:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-21 20:21:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-21 20:21:08,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-10-21 20:21:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:08,623 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-21 20:21:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-21 20:21:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:21:08,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:08,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-21 20:21:08,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:08,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash 82232734, now seen corresponding path program 4 times [2021-10-21 20:21:08,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:08,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068387390] [2021-10-21 20:21:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:08,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:08,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:08,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068387390] [2021-10-21 20:21:08,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068387390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:08,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265553612] [2021-10-21 20:21:08,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:21:08,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:08,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:08,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:21:08,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:21:08,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:21:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:09,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265553612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:09,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:09,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:21:09,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179192960] [2021-10-21 20:21:09,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:21:09,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:21:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:21:09,092 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:09,127 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-21 20:21:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:21:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 20:21:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:09,129 INFO L225 Difference]: With dead ends: 20 [2021-10-21 20:21:09,129 INFO L226 Difference]: Without dead ends: 17 [2021-10-21 20:21:09,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:21:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-21 20:21:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-21 20:21:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-21 20:21:09,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-10-21 20:21:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:09,134 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-21 20:21:09,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-21 20:21:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:21:09,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:09,135 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2021-10-21 20:21:09,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:09,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:09,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:09,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1717904348, now seen corresponding path program 5 times [2021-10-21 20:21:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:09,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30560744] [2021-10-21 20:21:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:09,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:09,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:09,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30560744] [2021-10-21 20:21:09,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30560744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:09,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163604013] [2021-10-21 20:21:09,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:21:09,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:09,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:09,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:21:09,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 20:21:09,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163604013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:09,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:21:09,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244512335] [2021-10-21 20:21:09,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:21:09,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:09,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:21:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:21:09,611 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:09,640 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-21 20:21:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:21:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 20:21:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:21:09,641 INFO L225 Difference]: With dead ends: 21 [2021-10-21 20:21:09,642 INFO L226 Difference]: Without dead ends: 18 [2021-10-21 20:21:09,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:21:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-21 20:21:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-21 20:21:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-21 20:21:09,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-10-21 20:21:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:21:09,646 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-21 20:21:09,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-21 20:21:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:21:09,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:21:09,647 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-21 20:21:09,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:21:09,876 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:21:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1640295066, now seen corresponding path program 6 times [2021-10-21 20:21:09,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:09,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224315858] [2021-10-21 20:21:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:09,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:09,905 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:09,957 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:09,957 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:21:09,958 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:21:09,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:21:09,966 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:21:09,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:21:09 BoogieIcfgContainer [2021-10-21 20:21:09,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:21:09,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:21:09,999 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:21:09,999 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:21:09,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:06" (3/4) ... [2021-10-21 20:21:10,003 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:21:10,042 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:21:10,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:21:10,044 INFO L168 Benchmark]: Toolchain (without parser) took 3684.26 ms. Allocated memory is still 113.2 MB. Free memory was 69.3 MB in the beginning and 41.9 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,044 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory is still 86.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:21:10,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.06 ms. Allocated memory is still 113.2 MB. Free memory was 69.1 MB in the beginning and 86.0 MB in the end (delta: -16.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.71 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 84.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,046 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 83.7 MB in the end (delta: 979.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:21:10,047 INFO L168 Benchmark]: RCFGBuilder took 309.30 ms. Allocated memory is still 113.2 MB. Free memory was 83.7 MB in the beginning and 74.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,047 INFO L168 Benchmark]: TraceAbstraction took 3030.76 ms. Allocated memory is still 113.2 MB. Free memory was 74.5 MB in the beginning and 43.5 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,048 INFO L168 Benchmark]: Witness Printer took 44.09 ms. Allocated memory is still 113.2 MB. Free memory was 43.5 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:10,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory is still 86.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 240.06 ms. Allocated memory is still 113.2 MB. Free memory was 69.1 MB in the beginning and 86.0 MB in the end (delta: -16.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.71 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 84.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.41 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 83.7 MB in the end (delta: 979.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 309.30 ms. Allocated memory is still 113.2 MB. Free memory was 83.7 MB in the beginning and 74.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3030.76 ms. Allocated memory is still 113.2 MB. Free memory was 74.5 MB in the beginning and 43.5 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. * Witness Printer took 44.09 ms. Allocated memory is still 113.2 MB. Free memory was 43.5 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 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: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int a = 6; [L19] a = 0 [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND FALSE !(a < 6) [L22] COND TRUE a == 6 [L23] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2918.8ms, OverallIterations: 7, TraceHistogramMax: 6, EmptinessCheckTime: 13.2ms, AutomataDifference: 215.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 21 SDslu, 29 SDs, 0 SdLazy, 84 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 173.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=6, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.8ms SsaConstructionTime, 222.8ms SatisfiabilityAnalysisTime, 795.3ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 246 SizeOfPredicates, 0 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/110 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 20:21:10,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf935b5-cccd-4f26-9559-3ab1cebd90e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...