./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 21:49:27,291 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 21:49:27,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 21:49:27,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 21:49:27,301 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 21:49:27,302 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 21:49:27,303 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 21:49:27,304 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 21:49:27,305 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 21:49:27,306 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 21:49:27,307 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 21:49:27,307 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 21:49:27,308 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 21:49:27,309 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 21:49:27,310 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 21:49:27,310 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 21:49:27,311 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 21:49:27,312 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 21:49:27,314 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 21:49:27,315 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 21:49:27,316 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 21:49:27,317 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 21:49:27,318 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 21:49:27,318 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 21:49:27,319 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 21:49:27,319 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 21:49:27,320 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 21:49:27,320 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 21:49:27,321 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 21:49:27,322 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 21:49:27,322 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 21:49:27,322 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 21:49:27,323 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 21:49:27,323 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 21:49:27,323 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 21:49:27,324 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 21:49:27,324 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-22 21:49:27,335 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 21:49:27,335 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 21:49:27,336 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 21:49:27,336 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 21:49:27,337 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 21:49:27,337 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 21:49:27,337 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 21:49:27,337 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 21:49:27,338 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 21:49:27,339 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 21:49:27,339 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 21:49:27,340 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 21:49:27,340 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 21:49:27,340 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 21:49:27,340 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 21:49:27,340 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 21:49:27,340 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 21:49:27,343 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 21:49:27,343 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 21:49:27,343 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2018-11-22 21:49:27,367 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 21:49:27,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 21:49:27,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 21:49:27,380 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 21:49:27,380 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 21:49:27,381 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-22 21:49:27,425 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/data/32edcaa3e/028daf54b6b047bcb006c4abe7e61a14/FLAG504bc4007 [2018-11-22 21:49:27,752 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 21:49:27,752 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-22 21:49:27,756 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/data/32edcaa3e/028daf54b6b047bcb006c4abe7e61a14/FLAG504bc4007 [2018-11-22 21:49:28,183 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/data/32edcaa3e/028daf54b6b047bcb006c4abe7e61a14 [2018-11-22 21:49:28,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 21:49:28,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 21:49:28,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 21:49:28,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 21:49:28,190 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 21:49:28,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28dbdbe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28, skipping insertion in model container [2018-11-22 21:49:28,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 21:49:28,207 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 21:49:28,311 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:49:28,313 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 21:49:28,322 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 21:49:28,330 INFO L195 MainTranslator]: Completed translation [2018-11-22 21:49:28,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28 WrapperNode [2018-11-22 21:49:28,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 21:49:28,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 21:49:28,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 21:49:28,331 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 21:49:28,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 21:49:28,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 21:49:28,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 21:49:28,343 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 21:49:28,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... [2018-11-22 21:49:28,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 21:49:28,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 21:49:28,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 21:49:28,354 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 21:49:28,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 21:49:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 21:49:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 21:49:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 21:49:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 21:49:28,421 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-22 21:49:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-22 21:49:28,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 21:49:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 21:49:28,509 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 21:49:28,509 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 21:49:28,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:28 BoogieIcfgContainer [2018-11-22 21:49:28,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 21:49:28,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 21:49:28,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 21:49:28,512 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 21:49:28,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:49:28" (1/3) ... [2018-11-22 21:49:28,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c171a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:28, skipping insertion in model container [2018-11-22 21:49:28,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:28" (2/3) ... [2018-11-22 21:49:28,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c171a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:28, skipping insertion in model container [2018-11-22 21:49:28,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:28" (3/3) ... [2018-11-22 21:49:28,515 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0_true-unreach-call_true-termination.c [2018-11-22 21:49:28,520 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 21:49:28,525 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 21:49:28,534 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 21:49:28,552 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 21:49:28,553 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 21:49:28,553 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 21:49:28,553 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 21:49:28,553 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 21:49:28,553 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 21:49:28,553 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 21:49:28,553 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 21:49:28,553 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 21:49:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-22 21:49:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 21:49:28,571 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:28,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:28,573 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:28,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-22 21:49:28,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:28,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:28,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:28,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:28,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 21:49:28,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 21:49:28,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 21:49:28,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 21:49:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 21:49:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 21:49:28,692 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-22 21:49:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:28,760 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-22 21:49:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 21:49:28,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-22 21:49:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:28,766 INFO L225 Difference]: With dead ends: 30 [2018-11-22 21:49:28,767 INFO L226 Difference]: Without dead ends: 18 [2018-11-22 21:49:28,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-22 21:49:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-22 21:49:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-22 21:49:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-22 21:49:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-22 21:49:28,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-22 21:49:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:28,793 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-22 21:49:28,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 21:49:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-22 21:49:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-22 21:49:28,795 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:28,795 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:28,796 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:28,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-22 21:49:28,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:28,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:28,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:28,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:28,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-22 21:49:28,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:28,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:28,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:28,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-22 21:49:28,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:28,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-22 21:49:28,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 21:49:28,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 21:49:28,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 21:49:28,920 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-22 21:49:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:28,991 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-22 21:49:28,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 21:49:28,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-22 21:49:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:28,992 INFO L225 Difference]: With dead ends: 25 [2018-11-22 21:49:28,992 INFO L226 Difference]: Without dead ends: 21 [2018-11-22 21:49:28,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-22 21:49:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-22 21:49:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-22 21:49:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-22 21:49:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-22 21:49:28,997 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-22 21:49:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:28,998 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-22 21:49:28,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 21:49:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-22 21:49:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 21:49:28,998 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:28,999 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:28,999 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:28,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-22 21:49:28,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:28,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:29,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:29,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-22 21:49:29,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:29,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:29,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 21:49:29,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 21:49:29,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:29,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-22 21:49:29,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:29,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-22 21:49:29,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-22 21:49:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 21:49:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-22 21:49:29,157 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-22 21:49:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:29,199 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-22 21:49:29,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 21:49:29,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-22 21:49:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:29,200 INFO L225 Difference]: With dead ends: 28 [2018-11-22 21:49:29,201 INFO L226 Difference]: Without dead ends: 24 [2018-11-22 21:49:29,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-22 21:49:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-22 21:49:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-22 21:49:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-22 21:49:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-22 21:49:29,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-22 21:49:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:29,205 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-22 21:49:29,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-22 21:49:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-22 21:49:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-22 21:49:29,205 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:29,206 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:29,206 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:29,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-22 21:49:29,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:29,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:29,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:29,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 21:49:29,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:29,276 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:29,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:49:29,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 21:49:29,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:29,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 21:49:29,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:29,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-22 21:49:29,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 21:49:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 21:49:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-22 21:49:29,354 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-22 21:49:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:29,413 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-22 21:49:29,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 21:49:29,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-22 21:49:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:29,415 INFO L225 Difference]: With dead ends: 31 [2018-11-22 21:49:29,415 INFO L226 Difference]: Without dead ends: 27 [2018-11-22 21:49:29,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-22 21:49:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-22 21:49:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-22 21:49:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-22 21:49:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-22 21:49:29,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-22 21:49:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:29,420 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-22 21:49:29,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 21:49:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-22 21:49:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 21:49:29,421 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:29,421 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:29,421 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:29,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-22 21:49:29,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:29,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:29,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:29,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-22 21:49:29,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:29,486 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:29,493 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 21:49:29,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 21:49:29,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:29,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-22 21:49:29,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:29,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 21:49:29,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 21:49:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 21:49:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-22 21:49:29,534 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-22 21:49:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:29,599 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-22 21:49:29,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 21:49:29,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-22 21:49:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:29,600 INFO L225 Difference]: With dead ends: 34 [2018-11-22 21:49:29,601 INFO L226 Difference]: Without dead ends: 30 [2018-11-22 21:49:29,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-22 21:49:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-22 21:49:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-22 21:49:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-22 21:49:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-22 21:49:29,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-22 21:49:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:29,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-22 21:49:29,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 21:49:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-22 21:49:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-22 21:49:29,607 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:29,607 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:29,607 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:29,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-22 21:49:29,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:29,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:29,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:29,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-22 21:49:29,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:29,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:29,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 21:49:29,748 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-22 21:49:29,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:29,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-22 21:49:29,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:29,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-22 21:49:29,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 21:49:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 21:49:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-22 21:49:29,779 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-22 21:49:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:29,852 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-22 21:49:29,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 21:49:29,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-22 21:49:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:29,853 INFO L225 Difference]: With dead ends: 37 [2018-11-22 21:49:29,853 INFO L226 Difference]: Without dead ends: 33 [2018-11-22 21:49:29,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-22 21:49:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-22 21:49:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-22 21:49:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-22 21:49:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-22 21:49:29,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-22 21:49:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:29,857 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-22 21:49:29,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 21:49:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-22 21:49:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 21:49:29,859 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:29,859 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:29,859 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:29,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-22 21:49:29,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:29,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-22 21:49:29,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:29,944 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:29,950 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 21:49:29,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-22 21:49:29,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:29,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-22 21:49:30,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:30,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-22 21:49:30,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 21:49:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 21:49:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-22 21:49:30,003 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-22 21:49:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:30,078 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-22 21:49:30,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 21:49:30,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-22 21:49:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:30,080 INFO L225 Difference]: With dead ends: 40 [2018-11-22 21:49:30,081 INFO L226 Difference]: Without dead ends: 36 [2018-11-22 21:49:30,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-22 21:49:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-22 21:49:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-22 21:49:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-22 21:49:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-22 21:49:30,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-22 21:49:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:30,087 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-22 21:49:30,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 21:49:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-22 21:49:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-22 21:49:30,088 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:30,088 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:30,089 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:30,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-22 21:49:30,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:30,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:30,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:30,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-22 21:49:30,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:30,174 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:30,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:30,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-22 21:49:30,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:30,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-22 21:49:30,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 21:49:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 21:49:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-22 21:49:30,222 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-22 21:49:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:30,313 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-22 21:49:30,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 21:49:30,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-22 21:49:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:30,315 INFO L225 Difference]: With dead ends: 43 [2018-11-22 21:49:30,315 INFO L226 Difference]: Without dead ends: 39 [2018-11-22 21:49:30,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-22 21:49:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-22 21:49:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-22 21:49:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-22 21:49:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-22 21:49:30,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-22 21:49:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:30,320 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-22 21:49:30,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 21:49:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-22 21:49:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 21:49:30,321 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:30,321 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:30,322 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:30,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-22 21:49:30,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:30,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-22 21:49:30,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:30,449 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:30,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 21:49:30,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 21:49:30,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:30,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-22 21:49:30,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:30,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-22 21:49:30,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 21:49:30,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 21:49:30,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-22 21:49:30,506 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-22 21:49:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:30,588 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-22 21:49:30,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 21:49:30,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-22 21:49:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:30,589 INFO L225 Difference]: With dead ends: 46 [2018-11-22 21:49:30,589 INFO L226 Difference]: Without dead ends: 42 [2018-11-22 21:49:30,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-22 21:49:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-22 21:49:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-22 21:49:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-22 21:49:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-22 21:49:30,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-22 21:49:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:30,593 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-22 21:49:30,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 21:49:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-22 21:49:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-22 21:49:30,594 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:30,594 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:30,594 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:30,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-22 21:49:30,595 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:30,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:30,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:30,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-22 21:49:30,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:30,716 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:30,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:49:30,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-22 21:49:30,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:30,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-22 21:49:30,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:30,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-22 21:49:30,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 21:49:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 21:49:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-22 21:49:30,785 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-22 21:49:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:30,875 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-22 21:49:30,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 21:49:30,875 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-22 21:49:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:30,876 INFO L225 Difference]: With dead ends: 49 [2018-11-22 21:49:30,876 INFO L226 Difference]: Without dead ends: 45 [2018-11-22 21:49:30,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-22 21:49:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-22 21:49:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-22 21:49:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-22 21:49:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-22 21:49:30,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-22 21:49:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:30,881 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-22 21:49:30,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 21:49:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-22 21:49:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 21:49:30,881 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:30,882 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:30,882 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:30,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:30,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-22 21:49:30,882 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:30,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:30,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:30,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-22 21:49:30,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:30,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:30,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 21:49:31,016 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 21:49:31,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:31,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-22 21:49:31,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:31,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-22 21:49:31,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 21:49:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 21:49:31,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-22 21:49:31,057 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-22 21:49:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:31,186 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-22 21:49:31,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 21:49:31,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-22 21:49:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:31,187 INFO L225 Difference]: With dead ends: 52 [2018-11-22 21:49:31,187 INFO L226 Difference]: Without dead ends: 48 [2018-11-22 21:49:31,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-22 21:49:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-22 21:49:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-22 21:49:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-22 21:49:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-22 21:49:31,192 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-22 21:49:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:31,192 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-22 21:49:31,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 21:49:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-22 21:49:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-22 21:49:31,193 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:31,194 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:31,194 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:31,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-22 21:49:31,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:31,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:31,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:31,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-22 21:49:31,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:31,305 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:31,314 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 21:49:31,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-22 21:49:31,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:31,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-22 21:49:31,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:31,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-22 21:49:31,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 21:49:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 21:49:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-22 21:49:31,394 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-22 21:49:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:31,512 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-22 21:49:31,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 21:49:31,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-22 21:49:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:31,513 INFO L225 Difference]: With dead ends: 55 [2018-11-22 21:49:31,513 INFO L226 Difference]: Without dead ends: 51 [2018-11-22 21:49:31,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-22 21:49:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-22 21:49:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-22 21:49:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-22 21:49:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-22 21:49:31,518 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-22 21:49:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:31,518 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-22 21:49:31,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 21:49:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-22 21:49:31,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 21:49:31,519 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:31,519 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:31,519 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:31,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-22 21:49:31,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:31,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:31,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:31,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-22 21:49:31,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:31,687 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:31,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 21:49:31,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-22 21:49:31,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:31,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-22 21:49:31,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:31,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-22 21:49:31,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 21:49:31,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 21:49:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-22 21:49:31,776 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-22 21:49:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:31,902 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-22 21:49:31,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 21:49:31,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-22 21:49:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:31,902 INFO L225 Difference]: With dead ends: 58 [2018-11-22 21:49:31,903 INFO L226 Difference]: Without dead ends: 54 [2018-11-22 21:49:31,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-22 21:49:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-22 21:49:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-22 21:49:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-22 21:49:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-22 21:49:31,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-22 21:49:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:31,907 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-22 21:49:31,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 21:49:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-22 21:49:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-22 21:49:31,908 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:31,908 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:31,908 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:31,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:31,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-22 21:49:31,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:31,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:31,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:31,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-22 21:49:32,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:32,044 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:32,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:32,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-22 21:49:32,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:32,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-22 21:49:32,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 21:49:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 21:49:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-22 21:49:32,112 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-22 21:49:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:32,267 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-22 21:49:32,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 21:49:32,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-22 21:49:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:32,268 INFO L225 Difference]: With dead ends: 61 [2018-11-22 21:49:32,268 INFO L226 Difference]: Without dead ends: 57 [2018-11-22 21:49:32,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-22 21:49:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-22 21:49:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-22 21:49:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-22 21:49:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-22 21:49:32,274 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-22 21:49:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:32,274 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-22 21:49:32,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 21:49:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-22 21:49:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 21:49:32,275 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:32,276 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:32,276 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:32,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-22 21:49:32,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:32,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:32,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:32,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:32,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-22 21:49:32,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:32,426 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:32,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 21:49:32,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 21:49:32,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:32,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-22 21:49:32,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:32,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-22 21:49:32,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 21:49:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 21:49:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-22 21:49:32,490 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-22 21:49:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:32,659 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-22 21:49:32,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 21:49:32,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-22 21:49:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:32,660 INFO L225 Difference]: With dead ends: 64 [2018-11-22 21:49:32,660 INFO L226 Difference]: Without dead ends: 60 [2018-11-22 21:49:32,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 21:49:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-22 21:49:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-22 21:49:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-22 21:49:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-22 21:49:32,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-22 21:49:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:32,665 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-22 21:49:32,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 21:49:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-22 21:49:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-22 21:49:32,667 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:32,667 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:32,667 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:32,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-22 21:49:32,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:32,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:32,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-22 21:49:32,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:32,795 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:32,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:49:32,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-22 21:49:32,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:32,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-22 21:49:32,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:32,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-22 21:49:32,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 21:49:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 21:49:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-22 21:49:32,875 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-22 21:49:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:33,050 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-22 21:49:33,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 21:49:33,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-22 21:49:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:33,051 INFO L225 Difference]: With dead ends: 67 [2018-11-22 21:49:33,051 INFO L226 Difference]: Without dead ends: 63 [2018-11-22 21:49:33,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 21:49:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-22 21:49:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-22 21:49:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-22 21:49:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-22 21:49:33,056 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-22 21:49:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:33,056 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-22 21:49:33,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 21:49:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-22 21:49:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-22 21:49:33,057 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:33,057 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:33,057 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:33,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-22 21:49:33,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:33,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:33,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:33,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:33,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-22 21:49:33,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:33,224 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:33,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 21:49:33,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 21:49:33,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:33,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-22 21:49:33,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:33,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-22 21:49:33,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 21:49:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 21:49:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-22 21:49:33,318 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-22 21:49:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:33,483 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-22 21:49:33,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 21:49:33,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-22 21:49:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:33,485 INFO L225 Difference]: With dead ends: 70 [2018-11-22 21:49:33,485 INFO L226 Difference]: Without dead ends: 66 [2018-11-22 21:49:33,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 21:49:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-22 21:49:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-22 21:49:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-22 21:49:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-22 21:49:33,488 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-22 21:49:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:33,489 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-22 21:49:33,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 21:49:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-22 21:49:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-22 21:49:33,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:33,490 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:33,490 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:33,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:33,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-22 21:49:33,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:33,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:33,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:33,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:33,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-22 21:49:33,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:33,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:33,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 21:49:33,780 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-22 21:49:33,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:33,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-22 21:49:33,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:33,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-22 21:49:33,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 21:49:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 21:49:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-22 21:49:33,820 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-22 21:49:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:33,996 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-22 21:49:33,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 21:49:33,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-22 21:49:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:33,997 INFO L225 Difference]: With dead ends: 73 [2018-11-22 21:49:33,997 INFO L226 Difference]: Without dead ends: 69 [2018-11-22 21:49:33,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 21:49:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-22 21:49:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-22 21:49:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-22 21:49:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-22 21:49:34,001 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-22 21:49:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:34,002 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-22 21:49:34,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 21:49:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-22 21:49:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-22 21:49:34,002 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:34,003 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:34,003 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:34,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-22 21:49:34,003 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:34,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:34,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:34,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-22 21:49:34,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:34,161 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:34,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 21:49:34,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-22 21:49:34,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:34,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-22 21:49:34,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:34,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-22 21:49:34,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 21:49:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 21:49:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-22 21:49:34,234 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-22 21:49:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:34,449 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-22 21:49:34,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 21:49:34,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-22 21:49:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:34,450 INFO L225 Difference]: With dead ends: 76 [2018-11-22 21:49:34,450 INFO L226 Difference]: Without dead ends: 72 [2018-11-22 21:49:34,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 21:49:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-22 21:49:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-22 21:49:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-22 21:49:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-22 21:49:34,454 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-22 21:49:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:34,454 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-22 21:49:34,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 21:49:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-22 21:49:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-22 21:49:34,455 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:34,455 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:34,455 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:34,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-22 21:49:34,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:34,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:34,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:34,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-22 21:49:34,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:34,643 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:34,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:34,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-22 21:49:34,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:34,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-22 21:49:34,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 21:49:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 21:49:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-22 21:49:34,710 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-22 21:49:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:34,914 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-22 21:49:34,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 21:49:34,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-22 21:49:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:34,915 INFO L225 Difference]: With dead ends: 79 [2018-11-22 21:49:34,915 INFO L226 Difference]: Without dead ends: 75 [2018-11-22 21:49:34,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 21:49:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-22 21:49:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-22 21:49:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-22 21:49:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-22 21:49:34,918 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-22 21:49:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:34,919 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-22 21:49:34,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 21:49:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-22 21:49:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-22 21:49:34,919 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:34,919 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:34,919 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:34,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-22 21:49:34,920 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:34,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:34,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:34,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-22 21:49:35,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:35,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:35,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 21:49:35,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 21:49:35,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:35,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-22 21:49:35,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:35,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-22 21:49:35,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 21:49:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 21:49:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-22 21:49:35,191 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-22 21:49:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:35,408 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-22 21:49:35,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 21:49:35,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-22 21:49:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:35,410 INFO L225 Difference]: With dead ends: 82 [2018-11-22 21:49:35,410 INFO L226 Difference]: Without dead ends: 78 [2018-11-22 21:49:35,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-22 21:49:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-22 21:49:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-22 21:49:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-22 21:49:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-22 21:49:35,414 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-22 21:49:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:35,414 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-22 21:49:35,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 21:49:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-22 21:49:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-22 21:49:35,415 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:35,415 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:35,415 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:35,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-22 21:49:35,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:35,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:35,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:35,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:35,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-22 21:49:35,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:35,644 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:35,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 21:49:35,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-22 21:49:35,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:35,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-22 21:49:35,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:35,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-22 21:49:35,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-22 21:49:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-22 21:49:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-22 21:49:35,727 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-22 21:49:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:35,968 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-22 21:49:35,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-22 21:49:35,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-22 21:49:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:35,970 INFO L225 Difference]: With dead ends: 85 [2018-11-22 21:49:35,970 INFO L226 Difference]: Without dead ends: 81 [2018-11-22 21:49:35,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-22 21:49:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-22 21:49:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-22 21:49:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-22 21:49:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-22 21:49:35,978 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-22 21:49:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:35,978 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-22 21:49:35,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-22 21:49:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-22 21:49:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-22 21:49:35,979 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:35,979 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:35,979 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:35,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2018-11-22 21:49:35,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:35,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:35,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:35,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:35,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-22 21:49:36,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:36,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:36,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 21:49:36,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 21:49:36,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:36,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-22 21:49:36,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:36,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-22 21:49:36,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-22 21:49:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-22 21:49:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-22 21:49:36,272 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-22 21:49:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:36,523 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-22 21:49:36,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-22 21:49:36,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-22 21:49:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:36,524 INFO L225 Difference]: With dead ends: 88 [2018-11-22 21:49:36,524 INFO L226 Difference]: Without dead ends: 84 [2018-11-22 21:49:36,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-22 21:49:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-22 21:49:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-22 21:49:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-22 21:49:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-22 21:49:36,527 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-22 21:49:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:36,527 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-22 21:49:36,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-22 21:49:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-22 21:49:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-22 21:49:36,528 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:36,528 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:36,529 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:36,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2018-11-22 21:49:36,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:36,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:36,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:36,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:36,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-22 21:49:36,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:36,749 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:36,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 21:49:36,800 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-22 21:49:36,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:36,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-22 21:49:36,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:36,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-22 21:49:36,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-22 21:49:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-22 21:49:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-22 21:49:36,846 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-22 21:49:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:37,109 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-22 21:49:37,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-22 21:49:37,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-22 21:49:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:37,111 INFO L225 Difference]: With dead ends: 91 [2018-11-22 21:49:37,111 INFO L226 Difference]: Without dead ends: 87 [2018-11-22 21:49:37,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-22 21:49:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-22 21:49:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-22 21:49:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-22 21:49:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-22 21:49:37,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-22 21:49:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:37,114 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-22 21:49:37,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-22 21:49:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-22 21:49:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-22 21:49:37,115 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:37,115 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:37,115 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:37,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2018-11-22 21:49:37,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:37,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:37,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:37,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:37,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-22 21:49:37,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:37,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:37,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 21:49:37,408 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-22 21:49:37,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 21:49:37,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-22 21:49:37,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:37,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-22 21:49:37,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-22 21:49:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-22 21:49:37,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-22 21:49:37,458 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-22 21:49:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:37,724 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-22 21:49:37,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-22 21:49:37,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-22 21:49:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:37,725 INFO L225 Difference]: With dead ends: 94 [2018-11-22 21:49:37,725 INFO L226 Difference]: Without dead ends: 90 [2018-11-22 21:49:37,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-22 21:49:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-22 21:49:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-22 21:49:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-22 21:49:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-22 21:49:37,728 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-22 21:49:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:37,728 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-22 21:49:37,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-22 21:49:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-22 21:49:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-22 21:49:37,729 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 21:49:37,729 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 21:49:37,729 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 21:49:37,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 21:49:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2018-11-22 21:49:37,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 21:49:37,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 21:49:37,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:37,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 21:49:37,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 21:49:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-22 21:49:39,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 21:49:39,284 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 21:49:39,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 21:49:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 21:49:39,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 21:49:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-22 21:49:42,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 21:49:42,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2018-11-22 21:49:42,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-11-22 21:49:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-11-22 21:49:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=12497, Unknown=0, NotChecked=0, Total=13340 [2018-11-22 21:49:42,498 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 116 states. [2018-11-22 21:49:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 21:49:45,658 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-22 21:49:45,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-22 21:49:45,659 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 163 [2018-11-22 21:49:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 21:49:45,659 INFO L225 Difference]: With dead ends: 93 [2018-11-22 21:49:45,659 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 21:49:45,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2079, Invalid=26651, Unknown=0, NotChecked=0, Total=28730 [2018-11-22 21:49:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 21:49:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 21:49:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 21:49:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 21:49:45,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2018-11-22 21:49:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 21:49:45,663 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 21:49:45,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-11-22 21:49:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 21:49:45,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 21:49:45,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 21:49:45,706 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 21:49:45,706 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 21:49:45,706 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 21:49:45,706 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 21:49:45,706 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 21:49:45,706 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 21:49:45,706 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-22 21:49:45,706 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-22 21:49:45,707 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 25) (<= 25 main_~a~0)) [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-22 21:49:45,707 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-22 21:49:45,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 09:49:45 BoogieIcfgContainer [2018-11-22 21:49:45,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 21:49:45,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 21:49:45,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 21:49:45,710 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 21:49:45,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:28" (3/4) ... [2018-11-22 21:49:45,714 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 21:49:45,719 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 21:49:45,720 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-22 21:49:45,720 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 21:49:45,724 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-22 21:49:45,724 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 21:49:45,724 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 21:49:45,750 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_274c4749-5892-40e9-9fa6-33dec875de33/bin-2019/uautomizer/witness.graphml [2018-11-22 21:49:45,750 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 21:49:45,750 INFO L168 Benchmark]: Toolchain (without parser) took 17564.28 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 523.8 MB). Free memory was 962.5 MB in the beginning and 1.1 GB in the end (delta: -171.9 MB). Peak memory consumption was 351.8 MB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,751 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:49:45,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.35 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.15 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 21:49:45,752 INFO L168 Benchmark]: Boogie Preprocessor took 10.30 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,752 INFO L168 Benchmark]: RCFGBuilder took 156.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,752 INFO L168 Benchmark]: TraceAbstraction took 17199.33 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 364.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.1 MB). Peak memory consumption was 357.8 MB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,753 INFO L168 Benchmark]: Witness Printer took 39.87 ms. Allocated memory is still 1.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 335.0 kB). Peak memory consumption was 335.0 kB. Max. memory is 11.5 GB. [2018-11-22 21:49:45,755 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.35 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.15 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.30 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 156.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17199.33 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 364.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.1 MB). Peak memory consumption was 357.8 MB. Max. memory is 11.5 GB. * Witness Printer took 39.87 ms. Allocated memory is still 1.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 335.0 kB). Peak memory consumption was 335.0 kB. 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 4 procedures, 20 locations, 1 error locations. SAFE Result, 17.1s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 6.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 916 SDslu, 4555 SDs, 0 SdLazy, 5554 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3437 GetRequests, 2569 SyntacticMatches, 0 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 4563 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548000 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6750 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17751/33800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...