./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/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 7f140b11074e684b22c263036fee9fde5b4c087a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:27:34,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:27:34,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:27:34,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:27:34,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:27:34,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:27:34,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:27:34,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:27:34,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:27:34,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:27:34,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:27:34,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:27:34,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:27:34,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:27:34,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:27:34,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:27:34,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:27:34,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:27:34,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:27:34,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:27:34,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:27:34,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:27:34,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:27:34,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:27:34,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:27:34,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:27:34,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:27:34,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:27:34,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:27:34,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:27:34,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:27:34,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:27:34,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:27:34,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:27:34,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:27:34,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:27:34,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:27:34,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:27:34,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:27:34,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:27:34,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:27:34,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 14:27:34,333 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:27:34,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:27:34,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:27:34,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:27:34,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 14:27:34,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:27:34,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:27:34,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:27:34,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2019-12-07 14:27:34,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:27:34,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:27:34,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:27:34,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:27:34,448 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:27:34,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-12-07 14:27:34,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/data/071f82ce9/cebfff4fe418498e9aab040118ece165/FLAGf38aa4d65 [2019-12-07 14:27:34,929 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:27:34,930 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-12-07 14:27:34,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/data/071f82ce9/cebfff4fe418498e9aab040118ece165/FLAGf38aa4d65 [2019-12-07 14:27:34,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/data/071f82ce9/cebfff4fe418498e9aab040118ece165 [2019-12-07 14:27:34,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:27:34,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:27:34,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:27:34,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:27:34,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:27:34,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:27:34" (1/1) ... [2019-12-07 14:27:34,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec38a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:34, skipping insertion in model container [2019-12-07 14:27:34,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:27:34" (1/1) ... [2019-12-07 14:27:34,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:27:34,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:27:35,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:27:35,061 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:27:35,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:27:35,111 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:27:35,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35 WrapperNode [2019-12-07 14:27:35,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:27:35,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:27:35,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:27:35,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:27:35,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:27:35,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:27:35,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:27:35,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:27:35,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... [2019-12-07 14:27:35,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:27:35,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:27:35,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:27:35,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:27:35,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/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 [2019-12-07 14:27:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:27:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:27:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-12-07 14:27:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-12-07 14:27:35,270 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:27:35,270 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 14:27:35,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:35 BoogieIcfgContainer [2019-12-07 14:27:35,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:27:35,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:27:35,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:27:35,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:27:35,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:27:34" (1/3) ... [2019-12-07 14:27:35,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d0bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:27:35, skipping insertion in model container [2019-12-07 14:27:35,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:27:35" (2/3) ... [2019-12-07 14:27:35,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d0bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:27:35, skipping insertion in model container [2019-12-07 14:27:35,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:35" (3/3) ... [2019-12-07 14:27:35,276 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2019-12-07 14:27:35,282 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:27:35,286 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 14:27:35,293 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 14:27:35,308 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:27:35,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 14:27:35,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:27:35,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:27:35,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:27:35,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:27:35,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:27:35,308 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:27:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 14:27:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:27:35,322 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:35,322 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:35,322 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:35,326 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 14:27:35,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:35,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967689051] [2019-12-07 14:27:35,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:27:35,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967689051] [2019-12-07 14:27:35,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:27:35,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:27:35,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448017085] [2019-12-07 14:27:35,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:27:35,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:27:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:27:35,467 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-12-07 14:27:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:35,516 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 14:27:35,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:27:35,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 14:27:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:35,523 INFO L225 Difference]: With dead ends: 24 [2019-12-07 14:27:35,523 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 14:27:35,525 INFO L630 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 [2019-12-07 14:27:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 14:27:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 14:27:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 14:27:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 14:27:35,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 14:27:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:35,551 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 14:27:35,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:27:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 14:27:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:27:35,553 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:35,553 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:35,553 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 14:27:35,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:35,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086955414] [2019-12-07 14:27:35,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 14:27:35,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086955414] [2019-12-07 14:27:35,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680122445] [2019-12-07 14:27:35,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 14:27:35,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 14:27:35,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:35,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 14:27:35,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500337983] [2019-12-07 14:27:35,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:27:35,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:27:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:27:35,687 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-12-07 14:27:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:35,725 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 14:27:35,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:27:35,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-12-07 14:27:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:35,726 INFO L225 Difference]: With dead ends: 21 [2019-12-07 14:27:35,726 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 14:27:35,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 14:27:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 14:27:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 14:27:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 14:27:35,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 14:27:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:35,730 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 14:27:35,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:27:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 14:27:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 14:27:35,731 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:35,731 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:35,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:35,932 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 14:27:35,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:35,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764868816] [2019-12-07 14:27:35,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 14:27:36,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764868816] [2019-12-07 14:27:36,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835205821] [2019-12-07 14:27:36,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:36,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:27:36,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:36,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:27:36,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 14:27:36,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:36,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 14:27:36,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588479504] [2019-12-07 14:27:36,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:27:36,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:27:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:27:36,079 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-12-07 14:27:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:36,116 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 14:27:36,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:27:36,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 14:27:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:36,117 INFO L225 Difference]: With dead ends: 24 [2019-12-07 14:27:36,117 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 14:27:36,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:27:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 14:27:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 14:27:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 14:27:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 14:27:36,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 14:27:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:36,122 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 14:27:36,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:27:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 14:27:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 14:27:36,123 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:36,123 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:36,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:36,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:36,324 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 14:27:36,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:36,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611079520] [2019-12-07 14:27:36,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 14:27:36,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611079520] [2019-12-07 14:27:36,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810084154] [2019-12-07 14:27:36,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:36,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 14:27:36,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:36,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 14:27:36,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 14:27:36,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:36,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 14:27:36,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190542883] [2019-12-07 14:27:36,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:27:36,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:27:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:27:36,490 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-12-07 14:27:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:36,539 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 14:27:36,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:27:36,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-12-07 14:27:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:36,540 INFO L225 Difference]: With dead ends: 27 [2019-12-07 14:27:36,540 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 14:27:36,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:27:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 14:27:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 14:27:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 14:27:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 14:27:36,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 14:27:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:36,544 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 14:27:36,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:27:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 14:27:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 14:27:36,545 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:36,545 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:36,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:36,746 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 14:27:36,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:36,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951227323] [2019-12-07 14:27:36,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 14:27:36,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951227323] [2019-12-07 14:27:36,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097153755] [2019-12-07 14:27:36,832 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:36,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:27:36,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:36,857 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 14:27:36,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 14:27:36,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:36,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 14:27:36,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132586801] [2019-12-07 14:27:36,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 14:27:36,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:27:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:27:36,875 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-12-07 14:27:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:36,924 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 14:27:36,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:27:36,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-12-07 14:27:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:36,925 INFO L225 Difference]: With dead ends: 30 [2019-12-07 14:27:36,926 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 14:27:36,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 14:27:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 14:27:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 14:27:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 14:27:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 14:27:36,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 14:27:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:36,931 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 14:27:36,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 14:27:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 14:27:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 14:27:36,933 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:36,933 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:37,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:37,134 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 14:27:37,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:37,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218884574] [2019-12-07 14:27:37,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 14:27:37,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218884574] [2019-12-07 14:27:37,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775467368] [2019-12-07 14:27:37,258 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:37,285 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 14:27:37,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:37,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 14:27:37,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 14:27:37,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:37,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 14:27:37,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457514658] [2019-12-07 14:27:37,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 14:27:37,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 14:27:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:27:37,308 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-12-07 14:27:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:37,366 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 14:27:37,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:27:37,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-12-07 14:27:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:37,367 INFO L225 Difference]: With dead ends: 33 [2019-12-07 14:27:37,368 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 14:27:37,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-12-07 14:27:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 14:27:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 14:27:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 14:27:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 14:27:37,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 14:27:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:37,372 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 14:27:37,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 14:27:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 14:27:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 14:27:37,373 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:37,374 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:37,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:37,575 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 14:27:37,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:37,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493479251] [2019-12-07 14:27:37,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 14:27:37,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493479251] [2019-12-07 14:27:37,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700727020] [2019-12-07 14:27:37,821 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:37,848 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 14:27:37,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:37,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:27:37,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 14:27:37,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:37,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 14:27:37,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767043438] [2019-12-07 14:27:37,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 14:27:37,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 14:27:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:27:37,875 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-12-07 14:27:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:37,941 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 14:27:37,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 14:27:37,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-12-07 14:27:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:37,942 INFO L225 Difference]: With dead ends: 36 [2019-12-07 14:27:37,942 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 14:27:37,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-07 14:27:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 14:27:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 14:27:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 14:27:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 14:27:37,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 14:27:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:37,947 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 14:27:37,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 14:27:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 14:27:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 14:27:37,948 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:37,948 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:38,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:38,149 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 14:27:38,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:38,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325199602] [2019-12-07 14:27:38,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 14:27:38,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325199602] [2019-12-07 14:27:38,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437762553] [2019-12-07 14:27:38,299 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:27:38,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 14:27:38,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:38,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 14:27:38,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596664449] [2019-12-07 14:27:38,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 14:27:38,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 14:27:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:27:38,358 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-12-07 14:27:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:38,432 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 14:27:38,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 14:27:38,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-12-07 14:27:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:38,433 INFO L225 Difference]: With dead ends: 39 [2019-12-07 14:27:38,433 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 14:27:38,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-07 14:27:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 14:27:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 14:27:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 14:27:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 14:27:38,437 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 14:27:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:38,437 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 14:27:38,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 14:27:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 14:27:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 14:27:38,438 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:38,438 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:38,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:38,639 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 14:27:38,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:38,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451942206] [2019-12-07 14:27:38,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 14:27:38,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451942206] [2019-12-07 14:27:38,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099514677] [2019-12-07 14:27:38,787 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:38,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:27:38,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:38,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 14:27:38,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 14:27:38,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:38,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 14:27:38,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109827478] [2019-12-07 14:27:38,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 14:27:38,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 14:27:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-07 14:27:38,852 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-12-07 14:27:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:38,938 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 14:27:38,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 14:27:38,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-12-07 14:27:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:38,940 INFO L225 Difference]: With dead ends: 42 [2019-12-07 14:27:38,940 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 14:27:38,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-12-07 14:27:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 14:27:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 14:27:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 14:27:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 14:27:38,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 14:27:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:38,946 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 14:27:38,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 14:27:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 14:27:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 14:27:38,947 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:38,947 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:39,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:39,149 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 14:27:39,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:39,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503015514] [2019-12-07 14:27:39,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 14:27:39,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503015514] [2019-12-07 14:27:39,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676391617] [2019-12-07 14:27:39,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:39,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 14:27:39,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:39,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 14:27:39,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 14:27:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 14:27:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639858028] [2019-12-07 14:27:39,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 14:27:39,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 14:27:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 14:27:39,503 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-12-07 14:27:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:39,596 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 14:27:39,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 14:27:39,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-12-07 14:27:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:39,597 INFO L225 Difference]: With dead ends: 45 [2019-12-07 14:27:39,597 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 14:27:39,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:27:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 14:27:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 14:27:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 14:27:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 14:27:39,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 14:27:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:39,602 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 14:27:39,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 14:27:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 14:27:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 14:27:39,603 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:39,603 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:39,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:39,804 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 14:27:39,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:39,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714844509] [2019-12-07 14:27:39,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 14:27:39,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714844509] [2019-12-07 14:27:39,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113035428] [2019-12-07 14:27:39,994 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:40,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:27:40,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:40,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 14:27:40,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 14:27:40,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:40,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 14:27:40,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175696886] [2019-12-07 14:27:40,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 14:27:40,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 14:27:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-07 14:27:40,052 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-12-07 14:27:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:40,140 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 14:27:40,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 14:27:40,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-12-07 14:27:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:40,141 INFO L225 Difference]: With dead ends: 48 [2019-12-07 14:27:40,141 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 14:27:40,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-12-07 14:27:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 14:27:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 14:27:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 14:27:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 14:27:40,145 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 14:27:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:40,146 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 14:27:40,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 14:27:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 14:27:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 14:27:40,147 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:40,147 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:40,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:40,348 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 14:27:40,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:40,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614864284] [2019-12-07 14:27:40,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 14:27:40,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614864284] [2019-12-07 14:27:40,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930449857] [2019-12-07 14:27:40,640 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:40,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 14:27:40,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:40,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 14:27:40,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 14:27:40,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:40,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-07 14:27:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331742945] [2019-12-07 14:27:40,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 14:27:40,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 14:27:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-07 14:27:40,716 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-12-07 14:27:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:40,815 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 14:27:40,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:27:40,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-12-07 14:27:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:40,816 INFO L225 Difference]: With dead ends: 51 [2019-12-07 14:27:40,816 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 14:27:40,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-12-07 14:27:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 14:27:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 14:27:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 14:27:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 14:27:40,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 14:27:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:40,821 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 14:27:40,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 14:27:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 14:27:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 14:27:40,822 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:40,822 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:41,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:41,024 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:41,024 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 14:27:41,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:41,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923447836] [2019-12-07 14:27:41,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 14:27:41,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923447836] [2019-12-07 14:27:41,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055646267] [2019-12-07 14:27:41,320 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:41,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 14:27:41,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:41,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 14:27:41,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 14:27:41,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:41,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 14:27:41,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196895703] [2019-12-07 14:27:41,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 14:27:41,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 14:27:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:27:41,397 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-12-07 14:27:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:41,497 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 14:27:41,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 14:27:41,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-12-07 14:27:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:41,498 INFO L225 Difference]: With dead ends: 54 [2019-12-07 14:27:41,498 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 14:27:41,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2019-12-07 14:27:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 14:27:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 14:27:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 14:27:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 14:27:41,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 14:27:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:41,503 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 14:27:41,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 14:27:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 14:27:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 14:27:41,503 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:41,503 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:41,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:41,705 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 14:27:41,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:41,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159475698] [2019-12-07 14:27:41,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 14:27:42,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159475698] [2019-12-07 14:27:42,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749833073] [2019-12-07 14:27:42,075 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 14:27:42,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 14:27:42,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:42,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 14:27:42,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453399722] [2019-12-07 14:27:42,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 14:27:42,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 14:27:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-12-07 14:27:42,135 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-12-07 14:27:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:42,260 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 14:27:42,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 14:27:42,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-12-07 14:27:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:42,261 INFO L225 Difference]: With dead ends: 57 [2019-12-07 14:27:42,261 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 14:27:42,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 14:27:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 14:27:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 14:27:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 14:27:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 14:27:42,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 14:27:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:42,267 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 14:27:42,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 14:27:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 14:27:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 14:27:42,268 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:42,268 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:42,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:42,470 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 14:27:42,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:42,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552103502] [2019-12-07 14:27:42,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 14:27:42,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552103502] [2019-12-07 14:27:42,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249318395] [2019-12-07 14:27:42,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:42,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:27:42,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:42,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 14:27:42,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 14:27:42,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:42,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-07 14:27:42,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134036716] [2019-12-07 14:27:42,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 14:27:42,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:42,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 14:27:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-12-07 14:27:42,837 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-12-07 14:27:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:42,972 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 14:27:42,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 14:27:42,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-12-07 14:27:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:42,973 INFO L225 Difference]: With dead ends: 60 [2019-12-07 14:27:42,973 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 14:27:42,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 14:27:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 14:27:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 14:27:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 14:27:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 14:27:42,982 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 14:27:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:42,982 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 14:27:42,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 14:27:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 14:27:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 14:27:42,983 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:27:42,983 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:27:43,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:43,184 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:27:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:27:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 14:27:43,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:27:43,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982677973] [2019-12-07 14:27:43,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:27:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:27:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-12-07 14:27:44,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982677973] [2019-12-07 14:27:44,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964287785] [2019-12-07 14:27:44,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:44,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 14:27:44,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:27:44,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 137 conjunts are in the unsatisfiable core [2019-12-07 14:27:44,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:27:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-12-07 14:27:45,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:27:45,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2019-12-07 14:27:45,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693918800] [2019-12-07 14:27:45,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-12-07 14:27:45,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:27:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-12-07 14:27:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 14:27:45,411 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 74 states. [2019-12-07 14:27:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:27:48,725 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-12-07 14:27:48,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-07 14:27:48,725 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 99 [2019-12-07 14:27:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:27:48,725 INFO L225 Difference]: With dead ends: 59 [2019-12-07 14:27:48,725 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:27:48,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2019-12-07 14:27:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:27:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:27:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:27:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:27:48,729 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2019-12-07 14:27:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:27:48,729 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:27:48,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-12-07 14:27:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:27:48,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:27:48,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:27:48,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2019-12-07 14:27:48,952 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L242 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 15) [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L242 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L246 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-12-07 14:27:48,953 INFO L249 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-12-07 14:27:48,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:27:48 BoogieIcfgContainer [2019-12-07 14:27:48,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:27:48,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:27:48,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:27:48,959 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:27:48,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:27:35" (3/4) ... [2019-12-07 14:27:48,963 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:27:48,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-12-07 14:27:48,973 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 14:27:48,973 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 14:27:49,003 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_69499bef-5473-4787-9edb-d78d8d7fbc70/bin/uautomizer/witness.graphml [2019-12-07 14:27:49,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:27:49,004 INFO L168 Benchmark]: Toolchain (without parser) took 14059.09 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 255.3 MB). Free memory was 943.5 MB in the beginning and 881.4 MB in the end (delta: 62.1 MB). Peak memory consumption was 317.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:27:49,004 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:27:49,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:27:49,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:27:49,005 INFO L168 Benchmark]: Boogie Preprocessor took 9.99 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:27:49,006 INFO L168 Benchmark]: RCFGBuilder took 128.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:27:49,006 INFO L168 Benchmark]: TraceAbstraction took 13686.60 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 149.9 MB). Free memory was 1.1 GB in the beginning and 884.3 MB in the end (delta: 199.5 MB). Peak memory consumption was 349.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:27:49,007 INFO L168 Benchmark]: Witness Printer took 44.16 ms. Allocated memory is still 1.3 GB. Free memory was 884.3 MB in the beginning and 881.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. [2019-12-07 14:27:49,009 INFO L335 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 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.99 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 128.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13686.60 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 149.9 MB). Free memory was 1.1 GB in the beginning and 884.3 MB in the end (delta: 199.5 MB). Peak memory consumption was 349.4 MB. Max. memory is 11.5 GB. * Witness Printer took 44.16 ms. Allocated memory is still 1.3 GB. Free memory was 884.3 MB in the beginning and 881.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 13.6s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 456 SDslu, 1196 SDs, 0 SdLazy, 2197 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1451 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1719 NumberOfCodeBlocks, 1719 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1688 ConstructedInterpolants, 0 QuantifiedInterpolants, 386556 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2580 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...