./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_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_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 cd6d4490a7412402195d3193de0347508566f7c8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:06:37,260 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 12:06:37,261 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 12:06:37,270 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 12:06:37,270 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 12:06:37,271 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 12:06:37,271 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 12:06:37,273 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 12:06:37,274 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 12:06:37,274 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 12:06:37,275 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 12:06:37,275 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 12:06:37,276 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 12:06:37,276 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 12:06:37,277 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 12:06:37,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 12:06:37,278 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 12:06:37,279 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 12:06:37,280 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 12:06:37,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 12:06:37,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 12:06:37,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 12:06:37,284 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 12:06:37,285 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 12:06:37,285 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 12:06:37,285 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 12:06:37,286 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 12:06:37,286 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 12:06:37,287 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 12:06:37,288 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 12:06:37,288 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 12:06:37,288 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 12:06:37,289 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 12:06:37,289 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 12:06:37,289 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 12:06:37,290 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 12:06:37,290 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 12:06:37,300 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 12:06:37,300 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 12:06:37,301 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 12:06:37,301 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 12:06:37,301 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 12:06:37,302 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 12:06:37,302 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 12:06:37,303 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 12:06:37,303 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:06:37,304 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 12:06:37,304 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 12:06:37,305 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 12:06:37,305 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 12:06:37,305 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 12:06:37,305 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_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 -> cd6d4490a7412402195d3193de0347508566f7c8 [2018-11-23 12:06:37,329 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 12:06:37,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 12:06:37,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 12:06:37,342 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 12:06:37,342 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 12:06:37,342 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-23 12:06:37,390 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/data/58361d3f4/b4bf8f10e99d4fc79b159d89f4aa791d/FLAG302d61d3e [2018-11-23 12:06:37,717 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 12:06:37,717 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-23 12:06:37,722 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/data/58361d3f4/b4bf8f10e99d4fc79b159d89f4aa791d/FLAG302d61d3e [2018-11-23 12:06:37,733 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/data/58361d3f4/b4bf8f10e99d4fc79b159d89f4aa791d [2018-11-23 12:06:37,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 12:06:37,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 12:06:37,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 12:06:37,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 12:06:37,742 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 12:06:37,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc0002c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37, skipping insertion in model container [2018-11-23 12:06:37,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 12:06:37,771 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 12:06:37,909 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:06:37,912 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 12:06:37,924 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:06:37,936 INFO L195 MainTranslator]: Completed translation [2018-11-23 12:06:37,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37 WrapperNode [2018-11-23 12:06:37,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 12:06:37,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 12:06:37,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 12:06:37,937 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 12:06:37,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 12:06:37,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 12:06:37,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 12:06:37,953 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 12:06:37,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... [2018-11-23 12:06:37,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 12:06:37,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 12:06:37,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 12:06:37,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 12:06:37,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 12:06:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 12:06:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 12:06:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 12:06:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 12:06:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 12:06:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-23 12:06:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-23 12:06:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-23 12:06:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-23 12:06:38,180 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 12:06:38,180 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 12:06:38,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:06:38 BoogieIcfgContainer [2018-11-23 12:06:38,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 12:06:38,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 12:06:38,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 12:06:38,184 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 12:06:38,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:06:37" (1/3) ... [2018-11-23 12:06:38,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496554be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:06:38, skipping insertion in model container [2018-11-23 12:06:38,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:06:37" (2/3) ... [2018-11-23 12:06:38,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496554be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:06:38, skipping insertion in model container [2018-11-23 12:06:38,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:06:38" (3/3) ... [2018-11-23 12:06:38,186 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-23 12:06:38,193 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 12:06:38,198 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 12:06:38,209 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 12:06:38,234 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 12:06:38,235 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 12:06:38,235 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 12:06:38,235 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 12:06:38,235 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 12:06:38,235 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 12:06:38,235 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 12:06:38,235 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 12:06:38,236 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 12:06:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-23 12:06:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 12:06:38,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:38,255 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:38,256 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:38,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-23 12:06:38,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:38,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:38,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:38,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:38,396 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 12:06:38,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:06:38,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 12:06:38,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 12:06:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 12:06:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 12:06:38,414 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-23 12:06:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:38,531 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-23 12:06:38,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 12:06:38,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 12:06:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:38,541 INFO L225 Difference]: With dead ends: 44 [2018-11-23 12:06:38,541 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 12:06:38,544 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 12:06:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 12:06:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 12:06:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 12:06:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 12:06:38,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-23 12:06:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:38,582 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 12:06:38,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 12:06:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 12:06:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 12:06:38,584 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:38,584 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:38,584 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:38,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-23 12:06:38,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:38,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:38,632 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 12:06:38,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:06:38,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 12:06:38,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 12:06:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 12:06:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 12:06:38,634 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-23 12:06:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:38,700 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-23 12:06:38,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 12:06:38,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 12:06:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:38,702 INFO L225 Difference]: With dead ends: 36 [2018-11-23 12:06:38,702 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 12:06:38,703 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 12:06:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 12:06:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 12:06:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 12:06:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 12:06:38,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-23 12:06:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:38,709 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 12:06:38,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 12:06:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 12:06:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 12:06:38,711 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:38,711 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 12:06:38,711 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:38,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-23 12:06:38,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:38,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:38,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:38,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:38,801 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 12:06:38,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:38,802 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:38,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:38,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:38,869 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 12:06:38,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:38,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-23 12:06:38,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 12:06:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 12:06:38,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-23 12:06:38,887 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-23 12:06:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:39,021 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-23 12:06:39,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:06:39,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-23 12:06:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:39,022 INFO L225 Difference]: With dead ends: 58 [2018-11-23 12:06:39,022 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 12:06:39,023 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 12:06:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 12:06:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-23 12:06:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 12:06:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-23 12:06:39,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-23 12:06:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:39,030 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-23 12:06:39,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 12:06:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-23 12:06:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 12:06:39,031 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:39,031 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 12:06:39,031 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:39,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-23 12:06:39,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:39,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:39,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,086 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 12:06:39,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:39,086 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:39,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:39,114 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 12:06:39,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:39,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 12:06:39,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 12:06:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 12:06:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:06:39,129 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-23 12:06:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:39,207 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-23 12:06:39,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 12:06:39,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-23 12:06:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:39,209 INFO L225 Difference]: With dead ends: 43 [2018-11-23 12:06:39,209 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 12:06:39,209 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 12:06:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 12:06:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-23 12:06:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 12:06:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-23 12:06:39,217 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-23 12:06:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:39,218 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-23 12:06:39,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 12:06:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-23 12:06:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 12:06:39,219 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:39,219 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 12:06:39,219 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:39,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:39,220 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-23 12:06:39,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:39,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:39,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,276 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 12:06:39,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:39,276 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:39,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:39,351 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 12:06:39,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:39,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-23 12:06:39,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 12:06:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 12:06:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-23 12:06:39,367 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-23 12:06:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:39,502 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-23 12:06:39,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 12:06:39,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-23 12:06:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:39,503 INFO L225 Difference]: With dead ends: 70 [2018-11-23 12:06:39,503 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 12:06:39,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:06:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 12:06:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 12:06:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 12:06:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-23 12:06:39,508 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-23 12:06:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:39,509 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-23 12:06:39,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 12:06:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-23 12:06:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 12:06:39,510 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:39,510 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 12:06:39,510 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:39,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-23 12:06:39,510 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:39,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:39,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,558 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 12:06:39,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:39,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:39,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:39,618 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 12:06:39,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:39,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-23 12:06:39,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 12:06:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 12:06:39,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 12:06:39,633 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-23 12:06:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:39,732 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-23 12:06:39,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:06:39,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-23 12:06:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:39,734 INFO L225 Difference]: With dead ends: 61 [2018-11-23 12:06:39,734 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 12:06:39,735 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 12:06:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 12:06:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-23 12:06:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-23 12:06:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-23 12:06:39,742 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-23 12:06:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:39,743 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-23 12:06:39,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 12:06:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-23 12:06:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-23 12:06:39,744 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:39,744 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 12:06:39,745 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:39,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-23 12:06:39,745 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:39,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:39,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,797 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 12:06:39,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:39,798 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:39,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:39,881 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 12:06:39,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:39,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-23 12:06:39,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 12:06:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 12:06:39,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 12:06:39,898 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-23 12:06:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:39,998 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-23 12:06:39,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:06:39,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-23 12:06:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:40,000 INFO L225 Difference]: With dead ends: 71 [2018-11-23 12:06:40,001 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 12:06:40,001 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 12:06:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 12:06:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-23 12:06:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 12:06:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-23 12:06:40,013 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-23 12:06:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:40,013 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-23 12:06:40,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 12:06:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-23 12:06:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-23 12:06:40,016 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:40,017 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 12:06:40,018 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:40,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-23 12:06:40,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:40,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:40,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:40,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:40,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:40,111 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 12:06:40,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:40,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:40,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:06:40,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:06:40,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:40,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:40,198 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 12:06:40,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:40,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-23 12:06:40,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 12:06:40,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 12:06:40,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:06:40,216 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-23 12:06:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:40,590 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-23 12:06:40,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 12:06:40,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-23 12:06:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:40,593 INFO L225 Difference]: With dead ends: 146 [2018-11-23 12:06:40,593 INFO L226 Difference]: Without dead ends: 103 [2018-11-23 12:06:40,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-23 12:06:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-23 12:06:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-23 12:06:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-23 12:06:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-23 12:06:40,612 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-23 12:06:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:40,613 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-23 12:06:40,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 12:06:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-23 12:06:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-23 12:06:40,618 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:40,618 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:40,618 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:40,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -593756845, now seen corresponding path program 1 times [2018-11-23 12:06:40,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:40,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:40,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:40,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:40,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 70 proven. 133 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-11-23 12:06:40,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:40,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:40,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:40,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 33 proven. 204 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-23 12:06:40,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:40,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-11-23 12:06:40,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 12:06:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 12:06:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-23 12:06:40,897 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-23 12:06:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:41,388 INFO L93 Difference]: Finished difference Result 232 states and 520 transitions. [2018-11-23 12:06:41,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 12:06:41,388 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 149 [2018-11-23 12:06:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:41,390 INFO L225 Difference]: With dead ends: 232 [2018-11-23 12:06:41,390 INFO L226 Difference]: Without dead ends: 129 [2018-11-23 12:06:41,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 12:06:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-23 12:06:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2018-11-23 12:06:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-23 12:06:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 184 transitions. [2018-11-23 12:06:41,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 184 transitions. Word has length 149 [2018-11-23 12:06:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:41,410 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 184 transitions. [2018-11-23 12:06:41,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 12:06:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 184 transitions. [2018-11-23 12:06:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-23 12:06:41,423 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:41,424 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 26, 26, 26, 23, 20, 20, 20, 20, 20, 20, 20, 18, 13, 13, 13, 13, 13, 13, 13, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:41,424 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:41,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash -100353676, now seen corresponding path program 1 times [2018-11-23 12:06:41,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:41,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:41,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:41,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:41,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6230 backedges. 179 proven. 708 refuted. 0 times theorem prover too weak. 5343 trivial. 0 not checked. [2018-11-23 12:06:41,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:41,648 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:41,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:41,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6230 backedges. 133 proven. 1023 refuted. 0 times theorem prover too weak. 5074 trivial. 0 not checked. [2018-11-23 12:06:42,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:42,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-11-23 12:06:42,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 12:06:42,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 12:06:42,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-23 12:06:42,058 INFO L87 Difference]: Start difference. First operand 118 states and 184 transitions. Second operand 18 states. [2018-11-23 12:06:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:42,538 INFO L93 Difference]: Finished difference Result 290 states and 587 transitions. [2018-11-23 12:06:42,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 12:06:42,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 458 [2018-11-23 12:06:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:42,541 INFO L225 Difference]: With dead ends: 290 [2018-11-23 12:06:42,541 INFO L226 Difference]: Without dead ends: 179 [2018-11-23 12:06:42,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 12:06:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-23 12:06:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2018-11-23 12:06:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-23 12:06:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 252 transitions. [2018-11-23 12:06:42,554 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 252 transitions. Word has length 458 [2018-11-23 12:06:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:42,554 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 252 transitions. [2018-11-23 12:06:42,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 12:06:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 252 transitions. [2018-11-23 12:06:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-11-23 12:06:42,558 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:42,559 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:42,559 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:42,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1387580488, now seen corresponding path program 2 times [2018-11-23 12:06:42,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:42,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:42,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:42,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:42,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 509 proven. 399 refuted. 0 times theorem prover too weak. 3801 trivial. 0 not checked. [2018-11-23 12:06:42,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:42,732 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:42,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:06:42,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:06:42,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:42,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 213 proven. 650 refuted. 0 times theorem prover too weak. 3846 trivial. 0 not checked. [2018-11-23 12:06:42,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:42,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-23 12:06:42,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 12:06:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 12:06:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-11-23 12:06:42,950 INFO L87 Difference]: Start difference. First operand 154 states and 252 transitions. Second operand 19 states. [2018-11-23 12:06:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:43,424 INFO L93 Difference]: Finished difference Result 415 states and 873 transitions. [2018-11-23 12:06:43,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 12:06:43,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 409 [2018-11-23 12:06:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:43,428 INFO L225 Difference]: With dead ends: 415 [2018-11-23 12:06:43,428 INFO L226 Difference]: Without dead ends: 260 [2018-11-23 12:06:43,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 12:06:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-11-23 12:06:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 201. [2018-11-23 12:06:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-23 12:06:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 378 transitions. [2018-11-23 12:06:43,453 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 378 transitions. Word has length 409 [2018-11-23 12:06:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:43,454 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 378 transitions. [2018-11-23 12:06:43,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 12:06:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 378 transitions. [2018-11-23 12:06:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2018-11-23 12:06:43,457 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:43,458 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 30, 30, 26, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:43,458 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:43,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1556253211, now seen corresponding path program 3 times [2018-11-23 12:06:43,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:43,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:43,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:43,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:43,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5734 backedges. 763 proven. 480 refuted. 0 times theorem prover too weak. 4491 trivial. 0 not checked. [2018-11-23 12:06:43,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:43,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:43,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:06:43,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 12:06:43,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:43,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5734 backedges. 706 proven. 105 refuted. 0 times theorem prover too weak. 4923 trivial. 0 not checked. [2018-11-23 12:06:43,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:43,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 19 [2018-11-23 12:06:43,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 12:06:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 12:06:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2018-11-23 12:06:43,850 INFO L87 Difference]: Start difference. First operand 201 states and 378 transitions. Second operand 19 states. [2018-11-23 12:06:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:44,390 INFO L93 Difference]: Finished difference Result 488 states and 1102 transitions. [2018-11-23 12:06:44,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 12:06:44,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 449 [2018-11-23 12:06:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:44,393 INFO L225 Difference]: With dead ends: 488 [2018-11-23 12:06:44,394 INFO L226 Difference]: Without dead ends: 296 [2018-11-23 12:06:44,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 12:06:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-11-23 12:06:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 244. [2018-11-23 12:06:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-23 12:06:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 446 transitions. [2018-11-23 12:06:44,410 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 446 transitions. Word has length 449 [2018-11-23 12:06:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:44,410 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 446 transitions. [2018-11-23 12:06:44,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 12:06:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 446 transitions. [2018-11-23 12:06:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-23 12:06:44,415 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:44,415 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:44,416 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:44,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2122481566, now seen corresponding path program 4 times [2018-11-23 12:06:44,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:44,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:44,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:44,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:44,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 959 proven. 575 refuted. 0 times theorem prover too weak. 7879 trivial. 0 not checked. [2018-11-23 12:06:44,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:44,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:44,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:06:44,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:06:44,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:44,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 961 proven. 570 refuted. 0 times theorem prover too weak. 7882 trivial. 0 not checked. [2018-11-23 12:06:44,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:44,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-11-23 12:06:44,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 12:06:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 12:06:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:06:44,963 INFO L87 Difference]: Start difference. First operand 244 states and 446 transitions. Second operand 16 states. [2018-11-23 12:06:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:45,091 INFO L93 Difference]: Finished difference Result 265 states and 477 transitions. [2018-11-23 12:06:45,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 12:06:45,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 572 [2018-11-23 12:06:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:45,094 INFO L225 Difference]: With dead ends: 265 [2018-11-23 12:06:45,094 INFO L226 Difference]: Without dead ends: 261 [2018-11-23 12:06:45,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-11-23 12:06:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-11-23 12:06:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2018-11-23 12:06:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-11-23 12:06:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 465 transitions. [2018-11-23 12:06:45,110 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 465 transitions. Word has length 572 [2018-11-23 12:06:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:45,111 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 465 transitions. [2018-11-23 12:06:45,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 12:06:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 465 transitions. [2018-11-23 12:06:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-23 12:06:45,114 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:45,114 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 30, 29, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:45,114 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:45,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash -152390853, now seen corresponding path program 5 times [2018-11-23 12:06:45,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:45,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:45,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:45,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:45,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 733 proven. 425 refuted. 0 times theorem prover too weak. 6091 trivial. 0 not checked. [2018-11-23 12:06:45,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:45,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:45,334 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:06:45,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-11-23 12:06:45,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:45,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 3929 proven. 59 refuted. 0 times theorem prover too weak. 3261 trivial. 0 not checked. [2018-11-23 12:06:45,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:45,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2018-11-23 12:06:45,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 12:06:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 12:06:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-11-23 12:06:45,619 INFO L87 Difference]: Start difference. First operand 255 states and 465 transitions. Second operand 21 states. [2018-11-23 12:06:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:46,293 INFO L93 Difference]: Finished difference Result 522 states and 1037 transitions. [2018-11-23 12:06:46,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 12:06:46,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 504 [2018-11-23 12:06:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:46,296 INFO L225 Difference]: With dead ends: 522 [2018-11-23 12:06:46,296 INFO L226 Difference]: Without dead ends: 264 [2018-11-23 12:06:46,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 12:06:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-11-23 12:06:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2018-11-23 12:06:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-11-23 12:06:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 409 transitions. [2018-11-23 12:06:46,309 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 409 transitions. Word has length 504 [2018-11-23 12:06:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:46,310 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 409 transitions. [2018-11-23 12:06:46,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 12:06:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 409 transitions. [2018-11-23 12:06:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-11-23 12:06:46,314 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:46,315 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 39, 39, 33, 32, 21, 21, 21, 21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 19, 13, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:46,315 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:46,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2074223811, now seen corresponding path program 6 times [2018-11-23 12:06:46,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:46,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:46,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:46,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:46,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 880 proven. 816 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2018-11-23 12:06:46,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:46,532 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:46,539 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:06:46,655 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-11-23 12:06:46,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:46,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 700 proven. 789 refuted. 0 times theorem prover too weak. 7467 trivial. 0 not checked. [2018-11-23 12:06:46,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:46,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2018-11-23 12:06:46,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 12:06:46,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 12:06:46,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2018-11-23 12:06:46,838 INFO L87 Difference]: Start difference. First operand 230 states and 409 transitions. Second operand 21 states. [2018-11-23 12:06:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:47,261 INFO L93 Difference]: Finished difference Result 430 states and 839 transitions. [2018-11-23 12:06:47,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 12:06:47,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 558 [2018-11-23 12:06:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:47,263 INFO L225 Difference]: With dead ends: 430 [2018-11-23 12:06:47,263 INFO L226 Difference]: Without dead ends: 178 [2018-11-23 12:06:47,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 552 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 12:06:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-23 12:06:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-11-23 12:06:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-23 12:06:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 263 transitions. [2018-11-23 12:06:47,279 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 263 transitions. Word has length 558 [2018-11-23 12:06:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:47,280 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 263 transitions. [2018-11-23 12:06:47,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 12:06:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 263 transitions. [2018-11-23 12:06:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-11-23 12:06:47,282 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:47,283 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:47,283 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:47,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 445531512, now seen corresponding path program 7 times [2018-11-23 12:06:47,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:47,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:47,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:47,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:47,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 293 proven. 1062 refuted. 0 times theorem prover too weak. 4014 trivial. 0 not checked. [2018-11-23 12:06:47,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:47,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:47,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:47,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 258 proven. 674 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2018-11-23 12:06:47,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:47,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 21 [2018-11-23 12:06:47,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 12:06:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 12:06:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-11-23 12:06:47,802 INFO L87 Difference]: Start difference. First operand 178 states and 263 transitions. Second operand 21 states. [2018-11-23 12:06:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:48,407 INFO L93 Difference]: Finished difference Result 380 states and 583 transitions. [2018-11-23 12:06:48,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-23 12:06:48,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 436 [2018-11-23 12:06:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:48,409 INFO L225 Difference]: With dead ends: 380 [2018-11-23 12:06:48,409 INFO L226 Difference]: Without dead ends: 211 [2018-11-23 12:06:48,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2018-11-23 12:06:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-23 12:06:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2018-11-23 12:06:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-11-23 12:06:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 266 transitions. [2018-11-23 12:06:48,418 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 266 transitions. Word has length 436 [2018-11-23 12:06:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:48,419 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 266 transitions. [2018-11-23 12:06:48,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 12:06:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 266 transitions. [2018-11-23 12:06:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-11-23 12:06:48,420 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:48,421 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:48,421 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:48,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash -515597281, now seen corresponding path program 8 times [2018-11-23 12:06:48,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:48,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:48,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:48,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:06:48,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 385 proven. 976 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2018-11-23 12:06:48,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:48,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/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 12:06:48,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:06:48,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:06:48,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:48,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 397 proven. 499 refuted. 0 times theorem prover too weak. 4120 trivial. 0 not checked. [2018-11-23 12:06:48,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:48,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 23 [2018-11-23 12:06:48,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 12:06:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 12:06:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2018-11-23 12:06:48,805 INFO L87 Difference]: Start difference. First operand 188 states and 266 transitions. Second operand 23 states. [2018-11-23 12:06:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:49,589 INFO L93 Difference]: Finished difference Result 451 states and 702 transitions. [2018-11-23 12:06:49,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-23 12:06:49,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 422 [2018-11-23 12:06:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:49,591 INFO L225 Difference]: With dead ends: 451 [2018-11-23 12:06:49,591 INFO L226 Difference]: Without dead ends: 272 [2018-11-23 12:06:49,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 12:06:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-11-23 12:06:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 195. [2018-11-23 12:06:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-23 12:06:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2018-11-23 12:06:49,610 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 422 [2018-11-23 12:06:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2018-11-23 12:06:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 12:06:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2018-11-23 12:06:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-23 12:06:49,613 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:49,614 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:49,614 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:49,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1638954211, now seen corresponding path program 9 times [2018-11-23 12:06:49,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:49,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:49,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:49,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:49,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1313 proven. 334 refuted. 0 times theorem prover too weak. 5614 trivial. 0 not checked. [2018-11-23 12:06:49,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:49,920 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:06:49,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:06:49,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-11-23 12:06:49,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:50,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1201 proven. 210 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2018-11-23 12:06:50,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:50,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 22 [2018-11-23 12:06:50,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 12:06:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 12:06:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-11-23 12:06:50,202 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand 22 states. [2018-11-23 12:06:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:50,765 INFO L93 Difference]: Finished difference Result 428 states and 655 transitions. [2018-11-23 12:06:50,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 12:06:50,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 504 [2018-11-23 12:06:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:50,768 INFO L225 Difference]: With dead ends: 428 [2018-11-23 12:06:50,768 INFO L226 Difference]: Without dead ends: 249 [2018-11-23 12:06:50,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 12:06:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-11-23 12:06:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 196. [2018-11-23 12:06:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-23 12:06:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 280 transitions. [2018-11-23 12:06:50,787 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 280 transitions. Word has length 504 [2018-11-23 12:06:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:50,787 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 280 transitions. [2018-11-23 12:06:50,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 12:06:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 280 transitions. [2018-11-23 12:06:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-11-23 12:06:50,790 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:50,790 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:50,790 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:50,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 10 times [2018-11-23 12:06:50,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:50,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:50,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:50,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:50,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-23 12:06:51,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:51,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:06:51,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:06:51,855 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:06:51,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:51,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-23 12:06:52,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:52,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2018-11-23 12:06:52,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-23 12:06:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-23 12:06:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 12:06:52,650 INFO L87 Difference]: Start difference. First operand 196 states and 280 transitions. Second operand 52 states. [2018-11-23 12:06:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:53,179 INFO L93 Difference]: Finished difference Result 215 states and 313 transitions. [2018-11-23 12:06:53,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-23 12:06:53,179 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2018-11-23 12:06:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:53,180 INFO L225 Difference]: With dead ends: 215 [2018-11-23 12:06:53,180 INFO L226 Difference]: Without dead ends: 211 [2018-11-23 12:06:53,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 514 SyntacticMatches, 35 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 12:06:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-23 12:06:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2018-11-23 12:06:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-11-23 12:06:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 300 transitions. [2018-11-23 12:06:53,191 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 300 transitions. Word has length 463 [2018-11-23 12:06:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:53,192 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 300 transitions. [2018-11-23 12:06:53,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-23 12:06:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 300 transitions. [2018-11-23 12:06:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-23 12:06:53,194 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:53,194 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 30, 29, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:53,194 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:53,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1110022815, now seen corresponding path program 11 times [2018-11-23 12:06:53,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:53,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:53,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:53,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:53,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 429 proven. 904 refuted. 0 times theorem prover too weak. 5916 trivial. 0 not checked. [2018-11-23 12:06:53,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:53,360 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:06:53,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:06:53,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-23 12:06:53,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:53,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 3946 proven. 234 refuted. 0 times theorem prover too weak. 3069 trivial. 0 not checked. [2018-11-23 12:06:53,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:53,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-11-23 12:06:53,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 12:06:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 12:06:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2018-11-23 12:06:53,639 INFO L87 Difference]: Start difference. First operand 206 states and 300 transitions. Second operand 22 states. [2018-11-23 12:06:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:54,158 INFO L93 Difference]: Finished difference Result 469 states and 746 transitions. [2018-11-23 12:06:54,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-23 12:06:54,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 504 [2018-11-23 12:06:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:54,161 INFO L225 Difference]: With dead ends: 469 [2018-11-23 12:06:54,161 INFO L226 Difference]: Without dead ends: 222 [2018-11-23 12:06:54,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2018-11-23 12:06:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-11-23 12:06:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2018-11-23 12:06:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-23 12:06:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2018-11-23 12:06:54,180 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 504 [2018-11-23 12:06:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:54,180 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2018-11-23 12:06:54,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 12:06:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2018-11-23 12:06:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-23 12:06:54,183 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:06:54,183 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:06:54,183 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:06:54,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:06:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash -6928239, now seen corresponding path program 12 times [2018-11-23 12:06:54,184 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:06:54,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:06:54,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:54,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:06:54,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:06:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:06:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 288 proven. 1213 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2018-11-23 12:06:54,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:06:54,442 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:06:54,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:06:54,578 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-11-23 12:06:54,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:06:54,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:06:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 3322 proven. 63 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2018-11-23 12:06:54,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:06:54,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2018-11-23 12:06:54,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 12:06:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 12:06:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2018-11-23 12:06:54,747 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand 23 states. [2018-11-23 12:06:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:06:55,178 INFO L93 Difference]: Finished difference Result 383 states and 525 transitions. [2018-11-23 12:06:55,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 12:06:55,179 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 504 [2018-11-23 12:06:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:06:55,179 INFO L225 Difference]: With dead ends: 383 [2018-11-23 12:06:55,179 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 12:06:55,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 12:06:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 12:06:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 12:06:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 12:06:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 12:06:55,182 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 504 [2018-11-23 12:06:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:06:55,182 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 12:06:55,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 12:06:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 12:06:55,182 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 12:06:55,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 12:06:55,336 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,369 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,489 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,713 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,740 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,750 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,844 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,846 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,846 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,951 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,971 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:55,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,033 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,040 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,045 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,060 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,061 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,071 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,095 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,095 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,096 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,097 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,144 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,169 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,222 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,254 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,283 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,292 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,297 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,344 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,345 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,369 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,369 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,387 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,388 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,405 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,406 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,406 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,414 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,414 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 12:06:56,827 WARN L180 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-11-23 12:06:57,017 WARN L180 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 1 [2018-11-23 12:06:57,234 WARN L180 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 1 [2018-11-23 12:06:57,622 WARN L180 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 27 [2018-11-23 12:06:57,868 WARN L180 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 15 [2018-11-23 12:06:58,371 WARN L180 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 44 [2018-11-23 12:06:58,373 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 12:06:58,373 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:06:58,373 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:06:58,373 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 12:06:58,373 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 12:06:58,373 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 12:06:58,373 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-23 12:06:58,373 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= main_~x~0 8)) [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-23 12:06:58,374 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (< 2 |fibo2_#in~n|) (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse1 (<= fibo2_~n |fibo2_#in~n|)) (.cse0 (<= |fibo2_#in~n| fibo2_~n))) (or (and (<= |fibo2_#t~ret2| 3) (<= 5 |fibo2_#in~n|) .cse0 .cse1 (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 5)) (and .cse1 (<= 8 |fibo2_#in~n|) .cse0) (and .cse0 (<= |fibo2_#t~ret2| 8) .cse1 (<= 8 |fibo2_#t~ret2|) (<= 7 fibo2_~n)) (and .cse0 (<= 5 |fibo2_#t~ret2|) (<= fibo2_~n 6) (<= |fibo2_#t~ret2| 5) (<= 6 |fibo2_#in~n|)))) [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 12:06:58,374 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-23 12:06:58,375 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (or (and (< 1 fibo1_~n) (<= |fibo1_#in~n| 2)) (< 3 |fibo1_#in~n|)) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (let ((.cse0 (<= 7 |fibo1_#in~n|))) (or (<= |fibo1_#in~n| 4) (<= 9 |fibo1_#in~n|) (and .cse0 (<= |fibo1_#in~n| 7)) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 6)) (and .cse0 (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|)))) (or (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1)) (< 3 |fibo1_#in~n|)) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n) (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (< 5 |fibo1_#in~n|) (< |fibo1_#in~n| 3))) [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-23 12:06:58,375 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-23 12:06:58,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:06:58 BoogieIcfgContainer [2018-11-23 12:06:58,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 12:06:58,378 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 12:06:58,378 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 12:06:58,378 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 12:06:58,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:06:38" (3/4) ... [2018-11-23 12:06:58,381 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 12:06:58,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 12:06:58,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 12:06:58,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-23 12:06:58,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-23 12:06:58,391 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 12:06:58,391 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 12:06:58,391 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 12:06:58,422 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_551b0d7d-0d33-4a56-8da7-ec1fcdf0dcda/bin-2019/uautomizer/witness.graphml [2018-11-23 12:06:58,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 12:06:58,423 INFO L168 Benchmark]: Toolchain (without parser) took 20686.63 ms. Allocated memory was 1.0 GB in the beginning and 2.0 GB in the end (delta: 985.1 MB). Free memory was 958.1 MB in the beginning and 1.5 GB in the end (delta: -508.6 MB). Peak memory consumption was 476.6 MB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,424 INFO L168 Benchmark]: CDTParser took 0.14 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 12:06:58,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.77 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.31 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:06:58,424 INFO L168 Benchmark]: Boogie Preprocessor took 13.16 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 944.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,425 INFO L168 Benchmark]: RCFGBuilder took 214.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 944.3 MB in the beginning and 1.2 GB in the end (delta: -239.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,425 INFO L168 Benchmark]: TraceAbstraction took 20196.32 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 782.8 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -282.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,425 INFO L168 Benchmark]: Witness Printer took 44.38 ms. Allocated memory is still 2.0 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 40.6 kB). Peak memory consumption was 40.6 kB. Max. memory is 11.5 GB. [2018-11-23 12:06:58,427 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 198.77 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.31 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.16 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 944.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 944.3 MB in the beginning and 1.2 GB in the end (delta: -239.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20196.32 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 782.8 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -282.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. * Witness Printer took 44.38 ms. Allocated memory is still 2.0 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 40.6 kB). Peak memory consumption was 40.6 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, 20.1s OverallTime, 21 OverallIterations, 42 TraceHistogramMax, 7.8s AutomataDifference, 0.0s DeadEndRemovalTime, 3.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 790 SDtfs, 1419 SDslu, 8201 SDs, 0 SdLazy, 10231 SolverSat, 1591 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6867 GetRequests, 6219 SyntacticMatches, 40 SemanticMatches, 608 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4396 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=255occurred in iteration=13, 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: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 436 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 1397 PreInvPairs, 2560 NumberOfFragments, 180 HoareAnnotationTreeSize, 1397 FomulaSimplifications, 327507 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 514262 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 12423 NumberOfCodeBlocks, 11175 NumberOfCodeBlocksAsserted, 163 NumberOfCheckSat, 12383 ConstructedInterpolants, 0 QuantifiedInterpolants, 8319293 SizeOfPredicates, 113 NumberOfNonLiveVariables, 10940 ConjunctsInSsa, 498 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 145244/162568 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...