./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 15:32:36,182 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 15:32:36,183 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 15:32:36,192 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 15:32:36,192 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 15:32:36,193 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 15:32:36,194 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 15:32:36,195 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 15:32:36,196 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 15:32:36,197 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 15:32:36,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 15:32:36,198 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 15:32:36,198 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 15:32:36,199 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 15:32:36,200 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 15:32:36,200 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 15:32:36,201 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 15:32:36,202 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 15:32:36,203 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 15:32:36,205 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 15:32:36,205 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 15:32:36,206 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 15:32:36,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 15:32:36,208 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 15:32:36,208 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 15:32:36,209 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 15:32:36,209 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 15:32:36,210 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 15:32:36,211 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 15:32:36,211 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 15:32:36,211 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 15:32:36,212 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 15:32:36,212 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 15:32:36,212 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 15:32:36,213 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 15:32:36,213 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 15:32:36,213 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 15:32:36,224 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 15:32:36,224 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 15:32:36,224 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 15:32:36,225 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 15:32:36,225 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 15:32:36,225 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 15:32:36,225 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 15:32:36,226 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 15:32:36,226 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 15:32:36,227 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 15:32:36,227 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:32:36,228 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 15:32:36,228 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 15:32:36,229 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 15:32:36,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 15:32:36,229 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_8e6cc9de-9b1f-484a-a10b-b067cfe27775/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-23 15:32:36,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 15:32:36,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 15:32:36,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 15:32:36,265 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 15:32:36,266 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 15:32:36,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 15:32:36,309 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/data/58062a14f/66e6d332ef9e4e83a88c9025f74776f0/FLAG3f020001d [2018-11-23 15:32:36,640 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 15:32:36,641 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 15:32:36,644 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/data/58062a14f/66e6d332ef9e4e83a88c9025f74776f0/FLAG3f020001d [2018-11-23 15:32:37,070 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/data/58062a14f/66e6d332ef9e4e83a88c9025f74776f0 [2018-11-23 15:32:37,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 15:32:37,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 15:32:37,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 15:32:37,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 15:32:37,078 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 15:32:37,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536b5fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37, skipping insertion in model container [2018-11-23 15:32:37,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 15:32:37,099 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 15:32:37,213 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:32:37,216 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 15:32:37,226 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:32:37,234 INFO L195 MainTranslator]: Completed translation [2018-11-23 15:32:37,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37 WrapperNode [2018-11-23 15:32:37,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 15:32:37,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 15:32:37,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 15:32:37,235 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 15:32:37,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 15:32:37,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 15:32:37,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 15:32:37,247 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 15:32:37,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... [2018-11-23 15:32:37,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 15:32:37,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 15:32:37,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 15:32:37,258 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 15:32:37,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:32:37,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 15:32:37,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 15:32:37,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 15:32:37,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 15:32:37,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 15:32:37,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 15:32:37,325 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-23 15:32:37,326 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-23 15:32:37,326 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-23 15:32:37,326 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-23 15:32:37,432 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 15:32:37,432 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 15:32:37,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:37 BoogieIcfgContainer [2018-11-23 15:32:37,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 15:32:37,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 15:32:37,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 15:32:37,436 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 15:32:37,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:32:37" (1/3) ... [2018-11-23 15:32:37,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6940b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:37, skipping insertion in model container [2018-11-23 15:32:37,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:37" (2/3) ... [2018-11-23 15:32:37,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6940b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:37, skipping insertion in model container [2018-11-23 15:32:37,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:37" (3/3) ... [2018-11-23 15:32:37,439 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 15:32:37,445 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 15:32:37,449 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 15:32:37,458 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 15:32:37,475 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 15:32:37,475 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 15:32:37,476 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 15:32:37,476 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 15:32:37,476 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 15:32:37,476 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 15:32:37,476 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 15:32:37,476 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 15:32:37,476 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 15:32:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-23 15:32:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 15:32:37,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:37,490 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:37,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:37,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-23 15:32:37,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:37,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:32:37,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:32:37,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:32:37,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:32:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:32:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:32:37,624 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-23 15:32:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:37,694 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-23 15:32:37,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:32:37,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 15:32:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:37,701 INFO L225 Difference]: With dead ends: 44 [2018-11-23 15:32:37,702 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 15:32:37,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 15:32:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 15:32:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 15:32:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 15:32:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 15:32:37,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-23 15:32:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:37,732 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 15:32:37,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:32:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 15:32:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 15:32:37,734 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:37,734 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:37,734 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:37,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-23 15:32:37,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:37,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:37,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:37,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:32:37,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:32:37,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:32:37,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:32:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:32:37,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:32:37,785 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-23 15:32:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:37,854 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-23 15:32:37,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:32:37,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 15:32:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:37,855 INFO L225 Difference]: With dead ends: 36 [2018-11-23 15:32:37,855 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 15:32:37,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 15:32:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 15:32:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 15:32:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 15:32:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 15:32:37,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-23 15:32:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:37,862 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 15:32:37,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:32:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 15:32:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 15:32:37,863 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:37,863 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:37,863 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:37,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-23 15:32:37,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:37,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:37,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:37,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 15:32:37,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:37,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:37,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:37,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 15:32:38,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:38,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-23 15:32:38,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 15:32:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 15:32:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:32:38,033 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-23 15:32:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:38,169 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-23 15:32:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 15:32:38,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-23 15:32:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:38,170 INFO L225 Difference]: With dead ends: 58 [2018-11-23 15:32:38,171 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 15:32:38,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:32:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 15:32:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-23 15:32:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 15:32:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-23 15:32:38,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-23 15:32:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-23 15:32:38,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 15:32:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-23 15:32:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 15:32:38,179 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:38,179 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:38,179 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:38,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-23 15:32:38,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 15:32:38,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:38,219 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:38,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 15:32:38,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:38,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 15:32:38,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:32:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:32:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 15:32:38,276 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-23 15:32:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:38,357 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-23 15:32:38,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 15:32:38,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-23 15:32:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:38,359 INFO L225 Difference]: With dead ends: 43 [2018-11-23 15:32:38,359 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 15:32:38,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:32:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 15:32:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-23 15:32:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 15:32:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-23 15:32:38,366 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-23 15:32:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:38,366 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-23 15:32:38,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:32:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-23 15:32:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 15:32:38,367 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:38,368 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:38,368 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:38,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-23 15:32:38,368 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:38,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:38,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 15:32:38,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:38,427 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:38,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 15:32:38,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:38,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-23 15:32:38,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 15:32:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 15:32:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-23 15:32:38,499 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-23 15:32:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:38,650 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-23 15:32:38,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 15:32:38,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-23 15:32:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:38,652 INFO L225 Difference]: With dead ends: 70 [2018-11-23 15:32:38,652 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 15:32:38,652 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 [2018-11-23 15:32:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 15:32:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 15:32:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 15:32:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-23 15:32:38,658 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-23 15:32:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:38,659 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-23 15:32:38,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 15:32:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-23 15:32:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 15:32:38,660 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:38,660 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:38,660 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:38,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:38,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-23 15:32:38,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:38,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:38,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 15:32:38,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:38,704 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:38,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 15:32:38,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:38,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-23 15:32:38,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 15:32:38,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 15:32:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 15:32:38,794 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-23 15:32:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:38,882 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-23 15:32:38,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 15:32:38,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-23 15:32:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:38,884 INFO L225 Difference]: With dead ends: 61 [2018-11-23 15:32:38,884 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 15:32:38,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-23 15:32:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 15:32:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-23 15:32:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-23 15:32:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-23 15:32:38,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-23 15:32:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:38,891 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-23 15:32:38,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 15:32:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-23 15:32:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-23 15:32:38,893 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:38,893 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:38,893 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:38,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-23 15:32:38,893 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:38,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:38,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 15:32:38,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:38,945 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:38,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:38,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 15:32:39,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:39,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-23 15:32:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 15:32:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 15:32:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 15:32:39,023 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-23 15:32:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:39,123 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-23 15:32:39,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 15:32:39,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-23 15:32:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:39,125 INFO L225 Difference]: With dead ends: 71 [2018-11-23 15:32:39,125 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 15:32:39,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-23 15:32:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 15:32:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-23 15:32:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 15:32:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-23 15:32:39,132 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-23 15:32:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:39,132 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-23 15:32:39,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 15:32:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-23 15:32:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-23 15:32:39,134 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:39,134 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:39,134 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:39,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-23 15:32:39,135 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:39,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:39,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-23 15:32:39,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:39,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:39,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 15:32:39,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 15:32:39,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:39,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-23 15:32:39,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:39,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-23 15:32:39,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 15:32:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 15:32:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:32:39,368 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-23 15:32:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:39,726 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-23 15:32:39,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 15:32:39,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-23 15:32:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:39,728 INFO L225 Difference]: With dead ends: 146 [2018-11-23 15:32:39,728 INFO L226 Difference]: Without dead ends: 103 [2018-11-23 15:32:39,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-23 15:32:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-23 15:32:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-23 15:32:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-23 15:32:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-23 15:32:39,745 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-23 15:32:39,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:39,745 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-23 15:32:39,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 15:32:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-23 15:32:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-23 15:32:39,748 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:39,748 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:39,748 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:39,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:39,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1162514868, now seen corresponding path program 1 times [2018-11-23 15:32:39,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:39,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:39,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 77 proven. 154 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2018-11-23 15:32:39,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:39,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:39,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:39,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 53 proven. 175 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2018-11-23 15:32:40,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:40,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-23 15:32:40,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 15:32:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 15:32:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-23 15:32:40,048 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-23 15:32:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:40,499 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-11-23 15:32:40,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-23 15:32:40,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 162 [2018-11-23 15:32:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:40,501 INFO L225 Difference]: With dead ends: 239 [2018-11-23 15:32:40,502 INFO L226 Difference]: Without dead ends: 158 [2018-11-23 15:32:40,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 15:32:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-23 15:32:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-11-23 15:32:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-23 15:32:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-11-23 15:32:40,523 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 162 [2018-11-23 15:32:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:40,524 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-11-23 15:32:40,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 15:32:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-11-23 15:32:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-23 15:32:40,527 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:40,527 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:40,527 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:40,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1502228340, now seen corresponding path program 2 times [2018-11-23 15:32:40,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:40,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:40,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:40,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:40,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 188 proven. 21 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2018-11-23 15:32:40,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:40,660 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:40,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 15:32:40,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 15:32:40,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:40,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 87 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2018-11-23 15:32:40,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:40,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2018-11-23 15:32:40,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 15:32:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 15:32:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-11-23 15:32:40,815 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 17 states. [2018-11-23 15:32:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:41,195 INFO L93 Difference]: Finished difference Result 349 states and 782 transitions. [2018-11-23 15:32:41,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-23 15:32:41,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 164 [2018-11-23 15:32:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:41,198 INFO L225 Difference]: With dead ends: 349 [2018-11-23 15:32:41,198 INFO L226 Difference]: Without dead ends: 201 [2018-11-23 15:32:41,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 15:32:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-23 15:32:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2018-11-23 15:32:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-23 15:32:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 309 transitions. [2018-11-23 15:32:41,216 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 309 transitions. Word has length 164 [2018-11-23 15:32:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:41,217 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 309 transitions. [2018-11-23 15:32:41,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 15:32:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 309 transitions. [2018-11-23 15:32:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-23 15:32:41,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:41,221 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 15, 14, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:41,221 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:41,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -733040196, now seen corresponding path program 3 times [2018-11-23 15:32:41,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:41,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:41,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:41,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 133 proven. 199 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-11-23 15:32:41,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:41,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:41,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:32:41,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-23 15:32:41,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:41,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 428 proven. 37 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-11-23 15:32:41,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:41,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 14 [2018-11-23 15:32:41,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 15:32:41,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 15:32:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:32:41,440 INFO L87 Difference]: Start difference. First operand 174 states and 309 transitions. Second operand 14 states. [2018-11-23 15:32:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:41,698 INFO L93 Difference]: Finished difference Result 291 states and 519 transitions. [2018-11-23 15:32:41,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 15:32:41,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 246 [2018-11-23 15:32:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:41,700 INFO L225 Difference]: With dead ends: 291 [2018-11-23 15:32:41,700 INFO L226 Difference]: Without dead ends: 116 [2018-11-23 15:32:41,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2018-11-23 15:32:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-23 15:32:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2018-11-23 15:32:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-23 15:32:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-11-23 15:32:41,709 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 246 [2018-11-23 15:32:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:41,710 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-11-23 15:32:41,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 15:32:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-11-23 15:32:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-23 15:32:41,712 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:41,712 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:41,712 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:41,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 4 times [2018-11-23 15:32:41,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:41,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:41,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:41,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-23 15:32:41,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:41,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:41,799 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:32:41,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:32:41,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:41,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-23 15:32:41,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:41,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 15:32:41,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 15:32:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 15:32:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:32:41,869 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 9 states. [2018-11-23 15:32:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:41,945 INFO L93 Difference]: Finished difference Result 108 states and 149 transitions. [2018-11-23 15:32:41,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 15:32:41,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2018-11-23 15:32:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:41,946 INFO L225 Difference]: With dead ends: 108 [2018-11-23 15:32:41,946 INFO L226 Difference]: Without dead ends: 104 [2018-11-23 15:32:41,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-23 15:32:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-23 15:32:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2018-11-23 15:32:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-23 15:32:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-11-23 15:32:41,954 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 150 [2018-11-23 15:32:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:41,954 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-11-23 15:32:41,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 15:32:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-11-23 15:32:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-23 15:32:41,957 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:41,957 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:41,957 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:41,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 5 times [2018-11-23 15:32:41,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 245 proven. 94 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2018-11-23 15:32:42,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:42,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:42,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 15:32:42,132 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-23 15:32:42,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:42,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 220 proven. 279 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-23 15:32:42,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:42,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2018-11-23 15:32:42,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 15:32:42,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 15:32:42,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2018-11-23 15:32:42,270 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 21 states. [2018-11-23 15:32:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:42,933 INFO L93 Difference]: Finished difference Result 257 states and 422 transitions. [2018-11-23 15:32:42,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-23 15:32:42,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 204 [2018-11-23 15:32:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:42,936 INFO L225 Difference]: With dead ends: 257 [2018-11-23 15:32:42,936 INFO L226 Difference]: Without dead ends: 163 [2018-11-23 15:32:42,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 15:32:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-23 15:32:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2018-11-23 15:32:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-11-23 15:32:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 208 transitions. [2018-11-23 15:32:42,947 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 208 transitions. Word has length 204 [2018-11-23 15:32:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:42,948 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 208 transitions. [2018-11-23 15:32:42,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 15:32:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 208 transitions. [2018-11-23 15:32:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-23 15:32:42,950 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:42,950 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:42,951 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:42,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2112932220, now seen corresponding path program 6 times [2018-11-23 15:32:42,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:42,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:42,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:42,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:42,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2018-11-23 15:32:43,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:43,091 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:43,117 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 15:32:43,154 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-23 15:32:43,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:43,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 420 proven. 18 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2018-11-23 15:32:43,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:43,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2018-11-23 15:32:43,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 15:32:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 15:32:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-11-23 15:32:43,235 INFO L87 Difference]: Start difference. First operand 141 states and 208 transitions. Second operand 13 states. [2018-11-23 15:32:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:43,364 INFO L93 Difference]: Finished difference Result 273 states and 418 transitions. [2018-11-23 15:32:43,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 15:32:43,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 190 [2018-11-23 15:32:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:43,366 INFO L225 Difference]: With dead ends: 273 [2018-11-23 15:32:43,366 INFO L226 Difference]: Without dead ends: 144 [2018-11-23 15:32:43,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2018-11-23 15:32:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-23 15:32:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2018-11-23 15:32:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-11-23 15:32:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2018-11-23 15:32:43,376 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 190 [2018-11-23 15:32:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:43,376 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2018-11-23 15:32:43,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 15:32:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2018-11-23 15:32:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-11-23 15:32:43,377 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:43,377 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:43,377 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:43,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 466415905, now seen corresponding path program 7 times [2018-11-23 15:32:43,378 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:43,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:43,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:43,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:43,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 111 proven. 348 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-11-23 15:32:43,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:43,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:43,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:43,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 115 proven. 342 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2018-11-23 15:32:43,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:43,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2018-11-23 15:32:43,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 15:32:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 15:32:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-23 15:32:43,627 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand 15 states. [2018-11-23 15:32:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:43,808 INFO L93 Difference]: Finished difference Result 176 states and 266 transitions. [2018-11-23 15:32:43,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 15:32:43,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 231 [2018-11-23 15:32:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:43,809 INFO L225 Difference]: With dead ends: 176 [2018-11-23 15:32:43,809 INFO L226 Difference]: Without dead ends: 109 [2018-11-23 15:32:43,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:32:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-23 15:32:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-23 15:32:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-23 15:32:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2018-11-23 15:32:43,820 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 231 [2018-11-23 15:32:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:43,820 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2018-11-23 15:32:43,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 15:32:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2018-11-23 15:32:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-23 15:32:43,821 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:43,821 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:43,822 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:43,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 8 times [2018-11-23 15:32:43,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:43,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:43,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:43,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:32:43,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-23 15:32:44,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:44,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:44,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 15:32:44,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 15:32:44,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:44,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-23 15:32:44,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:44,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-23 15:32:44,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 15:32:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 15:32:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 15:32:44,653 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 36 states. [2018-11-23 15:32:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:44,889 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2018-11-23 15:32:44,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 15:32:44,890 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-23 15:32:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:44,891 INFO L225 Difference]: With dead ends: 119 [2018-11-23 15:32:44,891 INFO L226 Difference]: Without dead ends: 109 [2018-11-23 15:32:44,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 15:32:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-23 15:32:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-23 15:32:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-23 15:32:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-11-23 15:32:44,899 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 177 [2018-11-23 15:32:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:44,899 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-11-23 15:32:44,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 15:32:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-11-23 15:32:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-23 15:32:44,901 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:32:44,901 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:32:44,901 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:32:44,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:32:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1843327003, now seen corresponding path program 9 times [2018-11-23 15:32:44,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:32:44,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:32:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:44,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:32:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:32:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:32:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 163 proven. 4 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-11-23 15:32:44,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:32:44,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:32:45,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:32:45,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 15:32:45,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:32:45,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:32:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 163 proven. 4 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-11-23 15:32:45,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:32:45,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 15:32:45,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:32:45,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:32:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 15:32:45,072 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 7 states. [2018-11-23 15:32:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:32:45,141 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2018-11-23 15:32:45,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 15:32:45,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2018-11-23 15:32:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:32:45,143 INFO L225 Difference]: With dead ends: 112 [2018-11-23 15:32:45,143 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 15:32:45,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:32:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 15:32:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 15:32:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 15:32:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 15:32:45,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2018-11-23 15:32:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:32:45,145 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 15:32:45,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:32:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 15:32:45,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 15:32:45,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 15:32:45,434 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:32:45,435 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:32:45,462 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:32:45,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:32:45,854 WARN L180 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2018-11-23 15:32:46,261 WARN L180 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 30 [2018-11-23 15:32:46,263 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 15:32:46,263 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:32:46,263 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 15:32:46,264 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-23 15:32:46,264 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-23 15:32:46,265 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (< 3 |fibo2_#in~n|)) [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= |fibo2_#in~n| fibo2_~n))) (and (or (and (<= fibo2_~n |fibo2_#in~n|) (<= 5 |fibo2_#in~n|) .cse0) (and (<= fibo2_~n 4) (<= 4 |fibo2_#in~n|) (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))) (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#in~n| 4) (<= 4 fibo2_~n))))) [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-23 15:32:46,265 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-23 15:32:46,266 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (or (< 4 |fibo1_#in~n|) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (< 1 |fibo1_#in~n|) (let ((.cse0 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 7 |fibo1_#in~n|) .cse0) (and (<= |fibo1_#in~n| 5) .cse0) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) .cse0))) (or (<= 5 |fibo1_#in~n|) (<= |fibo1_#in~n| 3))) [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-23 15:32:46,266 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-23 15:32:46,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:32:46 BoogieIcfgContainer [2018-11-23 15:32:46,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 15:32:46,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 15:32:46,270 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 15:32:46,270 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 15:32:46,270 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:37" (3/4) ... [2018-11-23 15:32:46,274 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 15:32:46,280 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 15:32:46,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 15:32:46,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-23 15:32:46,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-23 15:32:46,285 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 15:32:46,285 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 15:32:46,286 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 15:32:46,323 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e6cc9de-9b1f-484a-a10b-b067cfe27775/bin-2019/uautomizer/witness.graphml [2018-11-23 15:32:46,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 15:32:46,324 INFO L168 Benchmark]: Toolchain (without parser) took 9250.34 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 489.2 MB). Free memory was 960.7 MB in the beginning and 1.5 GB in the end (delta: -507.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:32:46,324 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:32:46,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.86 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:32:46,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.88 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:32:46,325 INFO L168 Benchmark]: Boogie Preprocessor took 10.50 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:32:46,326 INFO L168 Benchmark]: RCFGBuilder took 175.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 15:32:46,326 INFO L168 Benchmark]: TraceAbstraction took 8835.68 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 349.2 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -346.2 MB). Peak memory consumption was 548.8 MB. Max. memory is 11.5 GB. [2018-11-23 15:32:46,326 INFO L168 Benchmark]: Witness Printer took 53.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 504.7 kB). Peak memory consumption was 504.7 kB. Max. memory is 11.5 GB. [2018-11-23 15:32:46,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.86 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 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 11.88 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.50 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 175.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8835.68 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 349.2 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -346.2 MB). Peak memory consumption was 548.8 MB. Max. memory is 11.5 GB. * Witness Printer took 53.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 504.7 kB). Peak memory consumption was 504.7 kB. 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, 8.7s OverallTime, 17 OverallIterations, 18 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 1.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 507 SDtfs, 693 SDslu, 4023 SDs, 0 SdLazy, 4233 SolverSat, 674 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2292 GetRequests, 1959 SyntacticMatches, 18 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 146 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 515 PreInvPairs, 783 NumberOfFragments, 135 HoareAnnotationTreeSize, 515 FomulaSimplifications, 10641 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 5894 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 3963 NumberOfCodeBlocks, 3516 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 3931 ConstructedInterpolants, 0 QuantifiedInterpolants, 1118245 SizeOfPredicates, 71 NumberOfNonLiveVariables, 3380 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 14598/17348 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...