./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 08:15:32,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 08:15:32,154 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 08:15:32,160 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 08:15:32,160 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 08:15:32,160 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 08:15:32,161 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 08:15:32,162 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 08:15:32,163 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 08:15:32,163 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 08:15:32,164 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 08:15:32,164 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 08:15:32,164 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 08:15:32,165 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 08:15:32,165 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 08:15:32,166 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 08:15:32,166 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 08:15:32,167 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 08:15:32,168 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 08:15:32,169 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 08:15:32,169 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 08:15:32,170 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 08:15:32,171 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 08:15:32,171 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 08:15:32,171 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 08:15:32,172 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 08:15:32,172 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 08:15:32,173 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 08:15:32,173 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 08:15:32,173 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 08:15:32,174 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 08:15:32,174 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 08:15:32,174 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 08:15:32,174 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 08:15:32,175 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 08:15:32,175 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 08:15:32,175 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 08:15:32,182 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 08:15:32,183 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 08:15:32,183 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 08:15:32,183 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 08:15:32,183 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 08:15:32,184 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 08:15:32,184 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 08:15:32,185 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 08:15:32,185 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 08:15:32,185 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 08:15:32,186 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 08:15:32,186 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 08:15:32,186 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 08:15:32,186 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_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2018-12-09 08:15:32,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 08:15:32,209 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 08:15:32,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 08:15:32,212 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 08:15:32,212 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 08:15:32,213 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-09 08:15:32,247 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/data/5332314e7/5e8039b3ae7e4315973b2ff1905be01f/FLAG161376ac1 [2018-12-09 08:15:32,579 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 08:15:32,579 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-09 08:15:32,584 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/data/5332314e7/5e8039b3ae7e4315973b2ff1905be01f/FLAG161376ac1 [2018-12-09 08:15:32,984 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/data/5332314e7/5e8039b3ae7e4315973b2ff1905be01f [2018-12-09 08:15:32,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 08:15:32,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 08:15:32,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 08:15:32,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 08:15:32,990 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 08:15:32,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:15:32" (1/1) ... [2018-12-09 08:15:32,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672351b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:32, skipping insertion in model container [2018-12-09 08:15:32,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:15:32" (1/1) ... [2018-12-09 08:15:32,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 08:15:33,010 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 08:15:33,101 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:15:33,104 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 08:15:33,113 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:15:33,120 INFO L195 MainTranslator]: Completed translation [2018-12-09 08:15:33,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33 WrapperNode [2018-12-09 08:15:33,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 08:15:33,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 08:15:33,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 08:15:33,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 08:15:33,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 08:15:33,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 08:15:33,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 08:15:33,133 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 08:15:33,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... [2018-12-09 08:15:33,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 08:15:33,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 08:15:33,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 08:15:33,145 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 08:15:33,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:33,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 08:15:33,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 08:15:33,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 08:15:33,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 08:15:33,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 08:15:33,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 08:15:33,207 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-09 08:15:33,208 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-09 08:15:33,208 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-09 08:15:33,208 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-09 08:15:33,303 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 08:15:33,303 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 08:15:33,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:15:33 BoogieIcfgContainer [2018-12-09 08:15:33,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 08:15:33,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 08:15:33,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 08:15:33,306 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 08:15:33,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:15:32" (1/3) ... [2018-12-09 08:15:33,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440bfaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:15:33, skipping insertion in model container [2018-12-09 08:15:33,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:15:33" (2/3) ... [2018-12-09 08:15:33,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440bfaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:15:33, skipping insertion in model container [2018-12-09 08:15:33,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:15:33" (3/3) ... [2018-12-09 08:15:33,308 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-09 08:15:33,314 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 08:15:33,318 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 08:15:33,328 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 08:15:33,345 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 08:15:33,346 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 08:15:33,346 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 08:15:33,346 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 08:15:33,346 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 08:15:33,346 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 08:15:33,346 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 08:15:33,347 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 08:15:33,347 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 08:15:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-09 08:15:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 08:15:33,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:33,362 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:33,363 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:33,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-09 08:15:33,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:33,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:33,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 08:15:33,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:15:33,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 08:15:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 08:15:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 08:15:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 08:15:33,482 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-09 08:15:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:33,532 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-09 08:15:33,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 08:15:33,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 08:15:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:33,539 INFO L225 Difference]: With dead ends: 44 [2018-12-09 08:15:33,539 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 08:15:33,541 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 [2018-12-09 08:15:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 08:15:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-09 08:15:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 08:15:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 08:15:33,566 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-09 08:15:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:33,566 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 08:15:33,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 08:15:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 08:15:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 08:15:33,568 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:33,568 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:33,568 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:33,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-09 08:15:33,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 08:15:33,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:15:33,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 08:15:33,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 08:15:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 08:15:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 08:15:33,595 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-09 08:15:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:33,631 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-09 08:15:33,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 08:15:33,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-09 08:15:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:33,632 INFO L225 Difference]: With dead ends: 36 [2018-12-09 08:15:33,632 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 08:15:33,633 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 [2018-12-09 08:15:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 08:15:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-09 08:15:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 08:15:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 08:15:33,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-09 08:15:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:33,637 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 08:15:33,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 08:15:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 08:15:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 08:15:33,638 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:33,638 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] [2018-12-09 08:15:33,638 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:33,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-09 08:15:33,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:33,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:33,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 08:15:33,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:33,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:33,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 08:15:33,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:33,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-09 08:15:33,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 08:15:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 08:15:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 08:15:33,768 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-09 08:15:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:33,877 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-09 08:15:33,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 08:15:33,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-09 08:15:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:33,878 INFO L225 Difference]: With dead ends: 58 [2018-12-09 08:15:33,878 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 08:15:33,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-09 08:15:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 08:15:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-09 08:15:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 08:15:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-09 08:15:33,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-09 08:15:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:33,884 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-09 08:15:33,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 08:15:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-09 08:15:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 08:15:33,885 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:33,885 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] [2018-12-09 08:15:33,885 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:33,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-09 08:15:33,885 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:33,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:33,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 08:15:33,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:33,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:33,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:33,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 08:15:33,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:33,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-09 08:15:33,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 08:15:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 08:15:33,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 08:15:33,957 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-09 08:15:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:34,028 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-09 08:15:34,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 08:15:34,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-09 08:15:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:34,029 INFO L225 Difference]: With dead ends: 43 [2018-12-09 08:15:34,029 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 08:15:34,029 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 [2018-12-09 08:15:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 08:15:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-09 08:15:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 08:15:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-09 08:15:34,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-09 08:15:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:34,034 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-09 08:15:34,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 08:15:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-09 08:15:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 08:15:34,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:34,035 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] [2018-12-09 08:15:34,035 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:34,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-09 08:15:34,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:34,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:34,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 08:15:34,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:34,082 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:34,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 08:15:34,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:34,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-09 08:15:34,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 08:15:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 08:15:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-09 08:15:34,154 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-09 08:15:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:34,271 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-09 08:15:34,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:15:34,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-09 08:15:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:34,272 INFO L225 Difference]: With dead ends: 70 [2018-12-09 08:15:34,272 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 08:15:34,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-12-09 08:15:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 08:15:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-09 08:15:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 08:15:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-09 08:15:34,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-09 08:15:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:34,278 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-09 08:15:34,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 08:15:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-09 08:15:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 08:15:34,279 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:34,279 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] [2018-12-09 08:15:34,279 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:34,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-09 08:15:34,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:34,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:34,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 08:15:34,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:34,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:34,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 08:15:34,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:34,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-09 08:15:34,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 08:15:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 08:15:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-09 08:15:34,379 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-09 08:15:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:34,472 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-09 08:15:34,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 08:15:34,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-09 08:15:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:34,473 INFO L225 Difference]: With dead ends: 61 [2018-12-09 08:15:34,473 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 08:15:34,474 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 [2018-12-09 08:15:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 08:15:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-09 08:15:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 08:15:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-09 08:15:34,480 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-09 08:15:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:34,481 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-09 08:15:34,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 08:15:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-09 08:15:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-09 08:15:34,482 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:34,482 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] [2018-12-09 08:15:34,482 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:34,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-09 08:15:34,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:34,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 08:15:34,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:34,540 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:34,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 08:15:34,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:34,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2018-12-09 08:15:34,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 08:15:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 08:15:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-09 08:15:34,592 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 9 states. [2018-12-09 08:15:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:34,684 INFO L93 Difference]: Finished difference Result 66 states and 104 transitions. [2018-12-09 08:15:34,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 08:15:34,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2018-12-09 08:15:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:34,685 INFO L225 Difference]: With dead ends: 66 [2018-12-09 08:15:34,685 INFO L226 Difference]: Without dead ends: 62 [2018-12-09 08:15:34,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:15:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-09 08:15:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-12-09 08:15:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 08:15:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2018-12-09 08:15:34,691 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 54 [2018-12-09 08:15:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:34,692 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2018-12-09 08:15:34,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 08:15:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2018-12-09 08:15:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-09 08:15:34,693 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:34,693 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:34,693 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:34,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2018-12-09 08:15:34,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:34,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:34,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-12-09 08:15:34,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:34,862 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:34,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:34,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-12-09 08:15:34,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:34,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2018-12-09 08:15:34,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 08:15:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 08:15:34,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-12-09 08:15:34,989 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 21 states. [2018-12-09 08:15:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:35,117 INFO L93 Difference]: Finished difference Result 82 states and 140 transitions. [2018-12-09 08:15:35,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 08:15:35,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2018-12-09 08:15:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:35,119 INFO L225 Difference]: With dead ends: 82 [2018-12-09 08:15:35,119 INFO L226 Difference]: Without dead ends: 78 [2018-12-09 08:15:35,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-12-09 08:15:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-09 08:15:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2018-12-09 08:15:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 08:15:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 102 transitions. [2018-12-09 08:15:35,127 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 102 transitions. Word has length 68 [2018-12-09 08:15:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:35,127 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 102 transitions. [2018-12-09 08:15:35,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 08:15:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 102 transitions. [2018-12-09 08:15:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-09 08:15:35,128 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:35,129 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:35,129 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:35,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash -485791435, now seen corresponding path program 1 times [2018-12-09 08:15:35,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:35,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:35,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:35,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-12-09 08:15:35,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:35,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:35,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-12-09 08:15:35,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:35,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-12-09 08:15:35,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:15:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:15:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:15:35,275 INFO L87 Difference]: Start difference. First operand 61 states and 102 transitions. Second operand 12 states. [2018-12-09 08:15:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:35,363 INFO L93 Difference]: Finished difference Result 74 states and 125 transitions. [2018-12-09 08:15:35,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 08:15:35,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-12-09 08:15:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:35,364 INFO L225 Difference]: With dead ends: 74 [2018-12-09 08:15:35,364 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 08:15:35,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-12-09 08:15:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 08:15:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2018-12-09 08:15:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 08:15:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 89 transitions. [2018-12-09 08:15:35,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 89 transitions. Word has length 96 [2018-12-09 08:15:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:35,370 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 89 transitions. [2018-12-09 08:15:35,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:15:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 89 transitions. [2018-12-09 08:15:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 08:15:35,371 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:35,371 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:35,371 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:35,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2018-12-09 08:15:35,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:35,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 08:15:35,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:35,417 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:35,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 08:15:35,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:35,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-09 08:15:35,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 08:15:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 08:15:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-09 08:15:35,473 INFO L87 Difference]: Start difference. First operand 57 states and 89 transitions. Second operand 9 states. [2018-12-09 08:15:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:35,565 INFO L93 Difference]: Finished difference Result 82 states and 151 transitions. [2018-12-09 08:15:35,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 08:15:35,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2018-12-09 08:15:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:35,566 INFO L225 Difference]: With dead ends: 82 [2018-12-09 08:15:35,566 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 08:15:35,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:15:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 08:15:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-09 08:15:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 08:15:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2018-12-09 08:15:35,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 69 [2018-12-09 08:15:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-12-09 08:15:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 08:15:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2018-12-09 08:15:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-09 08:15:35,574 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:35,575 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:35,575 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:35,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1066786365, now seen corresponding path program 2 times [2018-12-09 08:15:35,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:35,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:35,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:15:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-12-09 08:15:35,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:35,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:35,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 08:15:35,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 08:15:35,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 08:15:35,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 39 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-12-09 08:15:35,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:35,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-12-09 08:15:35,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 08:15:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 08:15:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:15:35,732 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 13 states. [2018-12-09 08:15:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:35,889 INFO L93 Difference]: Finished difference Result 131 states and 183 transitions. [2018-12-09 08:15:35,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 08:15:35,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2018-12-09 08:15:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:35,890 INFO L225 Difference]: With dead ends: 131 [2018-12-09 08:15:35,890 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 08:15:35,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-12-09 08:15:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 08:15:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-12-09 08:15:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 08:15:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2018-12-09 08:15:35,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 95 [2018-12-09 08:15:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:35,895 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2018-12-09 08:15:35,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 08:15:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2018-12-09 08:15:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-09 08:15:35,895 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:15:35,896 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:15:35,896 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:15:35,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:15:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -520248959, now seen corresponding path program 3 times [2018-12-09 08:15:35,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:15:35,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:15:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 08:15:35,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:15:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:15:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 39 proven. 56 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-12-09 08:15:35,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:15:35,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/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 [2018-12-09 08:15:35,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 08:15:35,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 08:15:35,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 08:15:35,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:15:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 115 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-12-09 08:15:36,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:15:36,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2018-12-09 08:15:36,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 08:15:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 08:15:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-12-09 08:15:36,055 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 16 states. [2018-12-09 08:15:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:15:36,162 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2018-12-09 08:15:36,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:15:36,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2018-12-09 08:15:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:15:36,163 INFO L225 Difference]: With dead ends: 103 [2018-12-09 08:15:36,163 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 08:15:36,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2018-12-09 08:15:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 08:15:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 08:15:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 08:15:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 08:15:36,164 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2018-12-09 08:15:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:15:36,164 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 08:15:36,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 08:15:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 08:15:36,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 08:15:36,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 08:15:36,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,228 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,234 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,234 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,241 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,251 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 08:15:36,435 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 08:15:36,435 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-09 08:15:36,435 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-09 08:15:36,436 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 |fibo2_#in~n|))) [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-09 08:15:36,436 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-09 08:15:36,437 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-09 08:15:36,437 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse2 (<= |fibo1_#in~n| 3)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 .cse1 (<= 5 |fibo1_#in~n|)) (and (<= 3 fibo1_~n) .cse0 (or .cse2 (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse1))) (and .cse0 (<= 1 |fibo1_#t~ret0|) .cse2 (<= |fibo1_#t~ret0| 1) .cse1))) (< 1 |fibo1_#in~n|)) [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-09 08:15:36,437 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-09 08:15:36,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:15:36 BoogieIcfgContainer [2018-12-09 08:15:36,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 08:15:36,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 08:15:36,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 08:15:36,440 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 08:15:36,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:15:33" (3/4) ... [2018-12-09 08:15:36,443 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 08:15:36,447 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 08:15:36,448 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 08:15:36,448 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-09 08:15:36,448 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-09 08:15:36,452 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 08:15:36,452 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 08:15:36,452 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 08:15:36,487 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_75297ea3-ea11-4dd7-acb2-4de41539b7c2/bin-2019/uautomizer/witness.graphml [2018-12-09 08:15:36,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 08:15:36,487 INFO L168 Benchmark]: Toolchain (without parser) took 3500.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 954.9 MB in the beginning and 829.7 MB in the end (delta: 125.2 MB). Peak memory consumption was 256.8 MB. Max. memory is 11.5 GB. [2018-12-09 08:15:36,488 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:15:36,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.13 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 08:15:36,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:15:36,489 INFO L168 Benchmark]: Boogie Preprocessor took 11.13 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:15:36,489 INFO L168 Benchmark]: RCFGBuilder took 158.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -123.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-09 08:15:36,489 INFO L168 Benchmark]: TraceAbstraction took 3135.69 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 835.9 MB in the end (delta: 225.9 MB). Peak memory consumption was 279.4 MB. Max. memory is 11.5 GB. [2018-12-09 08:15:36,489 INFO L168 Benchmark]: Witness Printer took 47.09 ms. Allocated memory is still 1.2 GB. Free memory was 835.9 MB in the beginning and 829.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 11.5 GB. [2018-12-09 08:15:36,491 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 133.13 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 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 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.13 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -123.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3135.69 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 835.9 MB in the end (delta: 225.9 MB). Peak memory consumption was 279.4 MB. Max. memory is 11.5 GB. * Witness Printer took 47.09 ms. Allocated memory is still 1.2 GB. Free memory was 835.9 MB in the beginning and 829.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 3.0s OverallTime, 12 OverallIterations, 8 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 335 SDtfs, 226 SDslu, 2007 SDs, 0 SdLazy, 1524 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 762 GetRequests, 607 SyntacticMatches, 8 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=8, 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: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 67 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 122 PreInvPairs, 273 NumberOfFragments, 109 HoareAnnotationTreeSize, 122 FomulaSimplifications, 7402 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 444 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1245 NumberOfCodeBlocks, 1238 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1223 ConstructedInterpolants, 0 QuantifiedInterpolants, 164303 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1347 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1296/1666 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...