./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe571d33601eb001defa960d70b02ea99b59263c ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:41:31,023 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:41:31,024 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:41:31,034 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:41:31,035 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:41:31,036 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:41:31,037 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:41:31,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:41:31,040 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:41:31,040 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:41:31,041 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:41:31,041 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:41:31,042 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:41:31,043 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:41:31,043 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:41:31,044 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:41:31,044 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:41:31,046 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:41:31,047 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:41:31,049 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:41:31,050 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:41:31,051 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:41:31,052 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:41:31,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:41:31,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:41:31,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:41:31,055 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:41:31,055 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:41:31,056 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:41:31,057 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:41:31,057 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:41:31,058 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:41:31,058 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:41:31,058 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:41:31,059 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:41:31,059 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:41:31,059 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 11:41:31,071 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:41:31,071 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:41:31,072 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 11:41:31,072 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 11:41:31,072 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:41:31,073 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:41:31,073 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:41:31,073 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:41:31,073 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:41:31,073 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:41:31,073 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:41:31,074 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 11:41:31,075 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:41:31,075 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 11:41:31,075 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 11:41:31,076 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:41:31,076 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 11:41:31,076 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 11:41:31,076 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe571d33601eb001defa960d70b02ea99b59263c [2018-11-28 11:41:31,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:41:31,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:41:31,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:41:31,114 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:41:31,115 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:41:31,115 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-28 11:41:31,157 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/data/4ff551d5c/6002784f8b4644b1a2d85acae60e7e70/FLAG802dd568b [2018-11-28 11:41:31,498 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:41:31,499 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-28 11:41:31,504 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/data/4ff551d5c/6002784f8b4644b1a2d85acae60e7e70/FLAG802dd568b [2018-11-28 11:41:31,927 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/data/4ff551d5c/6002784f8b4644b1a2d85acae60e7e70 [2018-11-28 11:41:31,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:41:31,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:41:31,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:41:31,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:41:31,934 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:41:31,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:41:31" (1/1) ... [2018-11-28 11:41:31,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbc9dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:31, skipping insertion in model container [2018-11-28 11:41:31,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:41:31" (1/1) ... [2018-11-28 11:41:31,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:41:31,955 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:41:32,078 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:41:32,082 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:41:32,095 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:41:32,105 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:41:32,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32 WrapperNode [2018-11-28 11:41:32,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:41:32,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:41:32,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:41:32,106 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:41:32,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:41:32,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:41:32,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:41:32,123 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:41:32,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... [2018-11-28 11:41:32,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:41:32,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:41:32,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:41:32,139 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:41:32,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:41:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 11:41:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 11:41:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:41:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:41:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 11:41:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 11:41:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-28 11:41:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-28 11:41:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-28 11:41:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-28 11:41:32,355 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:41:32,355 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 11:41:32,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:41:32 BoogieIcfgContainer [2018-11-28 11:41:32,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:41:32,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 11:41:32,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 11:41:32,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 11:41:32,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:41:31" (1/3) ... [2018-11-28 11:41:32,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c8ef18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:41:32, skipping insertion in model container [2018-11-28 11:41:32,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:32" (2/3) ... [2018-11-28 11:41:32,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c8ef18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:41:32, skipping insertion in model container [2018-11-28 11:41:32,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:41:32" (3/3) ... [2018-11-28 11:41:32,364 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-28 11:41:32,371 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 11:41:32,377 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 11:41:32,388 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 11:41:32,413 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:41:32,414 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 11:41:32,414 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 11:41:32,414 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 11:41:32,414 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:41:32,414 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:41:32,415 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 11:41:32,415 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:41:32,415 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 11:41:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 11:41:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 11:41:32,431 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:32,432 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:32,434 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:32,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-28 11:41:32,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:32,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:32,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:32,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:41:32,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:41:32,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:41:32,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:41:32,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:41:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:41:32,600 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-28 11:41:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:32,680 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-28 11:41:32,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:41:32,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 11:41:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:32,689 INFO L225 Difference]: With dead ends: 44 [2018-11-28 11:41:32,690 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 11:41:32,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:41:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 11:41:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 11:41:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 11:41:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 11:41:32,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-28 11:41:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:32,728 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 11:41:32,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:41:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 11:41:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 11:41:32,729 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:32,729 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:32,730 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:32,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-28 11:41:32,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:32,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:32,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:32,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:41:32,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:41:32,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:41:32,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:41:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:41:32,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:41:32,790 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-28 11:41:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:32,858 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-28 11:41:32,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:41:32,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 11:41:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:32,860 INFO L225 Difference]: With dead ends: 36 [2018-11-28 11:41:32,860 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 11:41:32,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:41:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 11:41:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 11:41:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 11:41:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 11:41:32,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-28 11:41:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:32,868 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 11:41:32,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:41:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 11:41:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 11:41:32,870 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:32,870 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:32,871 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:32,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-28 11:41:32,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:32,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:32,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:32,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:41:32,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:32,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:32,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:41:33,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:33,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 11:41:33,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 11:41:33,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 11:41:33,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 11:41:33,079 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-28 11:41:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:33,234 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-28 11:41:33,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:41:33,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-28 11:41:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:33,236 INFO L225 Difference]: With dead ends: 58 [2018-11-28 11:41:33,236 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 11:41:33,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:41:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 11:41:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-28 11:41:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 11:41:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-28 11:41:33,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-28 11:41:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:33,244 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-28 11:41:33,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 11:41:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-28 11:41:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 11:41:33,246 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:33,247 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:33,247 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:33,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-28 11:41:33,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:33,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:33,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:41:33,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:33,321 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:33,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:41:33,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:33,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 11:41:33,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 11:41:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 11:41:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 11:41:33,378 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-28 11:41:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:33,484 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-28 11:41:33,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:41:33,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 11:41:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:33,486 INFO L225 Difference]: With dead ends: 43 [2018-11-28 11:41:33,486 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 11:41:33,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-28 11:41:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 11:41:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-28 11:41:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 11:41:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-28 11:41:33,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-28 11:41:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:33,495 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-28 11:41:33,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 11:41:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-28 11:41:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 11:41:33,496 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:33,496 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:33,497 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:33,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-28 11:41:33,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:33,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:33,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 11:41:33,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:33,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:33,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 11:41:33,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:33,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-28 11:41:33,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:41:33,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:41:33,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:41:33,670 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-28 11:41:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:33,855 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-28 11:41:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 11:41:33,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-28 11:41:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:33,856 INFO L225 Difference]: With dead ends: 70 [2018-11-28 11:41:33,857 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 11:41:33,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-28 11:41:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 11:41:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 11:41:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 11:41:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-28 11:41:33,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-28 11:41:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:33,866 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-28 11:41:33,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:41:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-28 11:41:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 11:41:33,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:33,868 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:33,868 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:33,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-28 11:41:33,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:33,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 11:41:33,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:33,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:33,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:33,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 11:41:34,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:34,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-28 11:41:34,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:41:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:41:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:41:34,008 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-28 11:41:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:34,119 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-28 11:41:34,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:41:34,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-28 11:41:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:34,121 INFO L225 Difference]: With dead ends: 61 [2018-11-28 11:41:34,121 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 11:41:34,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:41:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 11:41:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-28 11:41:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 11:41:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-28 11:41:34,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-28 11:41:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:34,133 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-28 11:41:34,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:41:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-28 11:41:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 11:41:34,136 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:34,136 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:34,137 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:34,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-28 11:41:34,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:34,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:34,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:34,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 11:41:34,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:34,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:34,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:34,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 11:41:34,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:34,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-28 11:41:34,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:41:34,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:41:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:41:34,315 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-28 11:41:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:34,427 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-28 11:41:34,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:41:34,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-28 11:41:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:34,429 INFO L225 Difference]: With dead ends: 71 [2018-11-28 11:41:34,429 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 11:41:34,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:41:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 11:41:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-28 11:41:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-28 11:41:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-28 11:41:34,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-28 11:41:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:34,440 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-28 11:41:34,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:41:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-28 11:41:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-28 11:41:34,443 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:34,444 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:34,444 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:34,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:34,444 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-28 11:41:34,444 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:34,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:34,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:34,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-28 11:41:34,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:34,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:34,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:41:34,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:41:34,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:41:34,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-28 11:41:34,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:34,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-28 11:41:34,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 11:41:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 11:41:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:41:34,643 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 14 states. [2018-11-28 11:41:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:34,949 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2018-11-28 11:41:34,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 11:41:34,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2018-11-28 11:41:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:34,952 INFO L225 Difference]: With dead ends: 127 [2018-11-28 11:41:34,952 INFO L226 Difference]: Without dead ends: 84 [2018-11-28 11:41:34,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-11-28 11:41:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-28 11:41:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-11-28 11:41:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-28 11:41:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2018-11-28 11:41:34,967 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 80 [2018-11-28 11:41:34,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:34,968 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2018-11-28 11:41:34,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 11:41:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2018-11-28 11:41:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-28 11:41:34,971 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:34,972 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:34,972 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:34,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1162571493, now seen corresponding path program 1 times [2018-11-28 11:41:34,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:34,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:34,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:41:34,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 74 proven. 14 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-28 11:41:35,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:35,055 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:35,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:35,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-11-28 11:41:35,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:35,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2018-11-28 11:41:35,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 11:41:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 11:41:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:41:35,156 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand 15 states. [2018-11-28 11:41:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:35,533 INFO L93 Difference]: Finished difference Result 180 states and 349 transitions. [2018-11-28 11:41:35,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 11:41:35,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2018-11-28 11:41:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:35,536 INFO L225 Difference]: With dead ends: 180 [2018-11-28 11:41:35,536 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 11:41:35,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2018-11-28 11:41:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 11:41:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2018-11-28 11:41:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-28 11:41:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2018-11-28 11:41:35,555 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 95 [2018-11-28 11:41:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:35,556 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2018-11-28 11:41:35,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 11:41:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2018-11-28 11:41:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-28 11:41:35,559 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:35,559 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:35,559 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:35,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 2 times [2018-11-28 11:41:35,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:35,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:35,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:35,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:35,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-28 11:41:35,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:35,653 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:35,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:41:35,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:41:35,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:41:35,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-28 11:41:35,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:35,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-28 11:41:35,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 11:41:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 11:41:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:41:35,773 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 15 states. [2018-11-28 11:41:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:36,246 INFO L93 Difference]: Finished difference Result 253 states and 504 transitions. [2018-11-28 11:41:36,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 11:41:36,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-11-28 11:41:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:36,249 INFO L225 Difference]: With dead ends: 253 [2018-11-28 11:41:36,249 INFO L226 Difference]: Without dead ends: 166 [2018-11-28 11:41:36,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-11-28 11:41:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-28 11:41:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2018-11-28 11:41:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-28 11:41:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 275 transitions. [2018-11-28 11:41:36,270 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 275 transitions. Word has length 82 [2018-11-28 11:41:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:36,271 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 275 transitions. [2018-11-28 11:41:36,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 11:41:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 275 transitions. [2018-11-28 11:41:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-28 11:41:36,275 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:36,276 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:36,276 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:36,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2123215105, now seen corresponding path program 1 times [2018-11-28 11:41:36,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:36,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:36,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:41:36,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 96 proven. 3 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-11-28 11:41:36,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:36,388 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:36,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:36,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 67 proven. 73 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-28 11:41:36,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:36,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2018-11-28 11:41:36,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 11:41:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 11:41:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-11-28 11:41:36,552 INFO L87 Difference]: Start difference. First operand 154 states and 275 transitions. Second operand 17 states. [2018-11-28 11:41:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:36,844 INFO L93 Difference]: Finished difference Result 339 states and 721 transitions. [2018-11-28 11:41:36,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 11:41:36,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 122 [2018-11-28 11:41:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:36,848 INFO L225 Difference]: With dead ends: 339 [2018-11-28 11:41:36,848 INFO L226 Difference]: Without dead ends: 138 [2018-11-28 11:41:36,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2018-11-28 11:41:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-28 11:41:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2018-11-28 11:41:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-28 11:41:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 202 transitions. [2018-11-28 11:41:36,865 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 202 transitions. Word has length 122 [2018-11-28 11:41:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:36,866 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 202 transitions. [2018-11-28 11:41:36,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 11:41:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 202 transitions. [2018-11-28 11:41:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-28 11:41:36,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:36,868 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:36,869 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:36,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash -878903457, now seen corresponding path program 2 times [2018-11-28 11:41:36,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:36,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:36,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:36,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:41:36,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:41:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-11-28 11:41:36,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:41:36,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:41:36,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:41:37,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:41:37,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:41:37,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:41:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 87 proven. 23 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-28 11:41:37,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:41:37,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-11-28 11:41:37,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 11:41:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 11:41:37,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:41:37,059 INFO L87 Difference]: Start difference. First operand 132 states and 202 transitions. Second operand 12 states. [2018-11-28 11:41:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:41:37,145 INFO L93 Difference]: Finished difference Result 150 states and 227 transitions. [2018-11-28 11:41:37,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 11:41:37,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2018-11-28 11:41:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:41:37,147 INFO L225 Difference]: With dead ends: 150 [2018-11-28 11:41:37,147 INFO L226 Difference]: Without dead ends: 146 [2018-11-28 11:41:37,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:41:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-28 11:41:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2018-11-28 11:41:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-28 11:41:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 214 transitions. [2018-11-28 11:41:37,156 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 214 transitions. Word has length 122 [2018-11-28 11:41:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:41:37,157 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 214 transitions. [2018-11-28 11:41:37,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 11:41:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 214 transitions. [2018-11-28 11:41:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 11:41:37,159 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:41:37,159 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:41:37,159 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:41:37,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:41:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2018-11-28 11:41:37,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:41:37,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:41:37,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:37,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:41:37,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:41:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:41:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:41:37,193 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 11:41:37,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:41:37 BoogieIcfgContainer [2018-11-28 11:41:37,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 11:41:37,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:41:37,228 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:41:37,228 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:41:37,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:41:32" (3/4) ... [2018-11-28 11:41:37,232 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 11:41:37,289 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_188bbfe7-f545-4b21-82f4-0a68f620727d/bin-2019/uautomizer/witness.graphml [2018-11-28 11:41:37,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:41:37,290 INFO L168 Benchmark]: Toolchain (without parser) took 5360.34 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 302.0 MB). Free memory was 962.0 MB in the beginning and 1.0 GB in the end (delta: -78.8 MB). Peak memory consumption was 223.1 MB. Max. memory is 11.5 GB. [2018-11-28 11:41:37,292 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:41:37,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.90 ms. Allocated memory is still 1.0 GB. Free memory was 962.0 MB in the beginning and 951.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:41:37,293 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.39 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:41:37,293 INFO L168 Benchmark]: Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:41:37,293 INFO L168 Benchmark]: RCFGBuilder took 217.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -162.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:41:37,293 INFO L168 Benchmark]: TraceAbstraction took 4871.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 169.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 64.0 MB). Peak memory consumption was 233.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:41:37,294 INFO L168 Benchmark]: Witness Printer took 60.98 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 11.5 GB. [2018-11-28 11:41:37,296 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.90 ms. Allocated memory is still 1.0 GB. Free memory was 962.0 MB in the beginning and 951.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.39 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.42 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -162.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4871.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 169.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 64.0 MB). Peak memory consumption was 233.3 MB. Max. memory is 11.5 GB. * Witness Printer took 60.98 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 4.8s OverallTime, 13 OverallIterations, 10 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 404 SDslu, 1824 SDs, 0 SdLazy, 2348 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 862 GetRequests, 682 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 100 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1510 NumberOfCodeBlocks, 1510 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1379 ConstructedInterpolants, 0 QuantifiedInterpolants, 184161 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1547 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2100/2478 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...