./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:07:05,482 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:07:05,484 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:07:05,499 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:07:05,500 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:07:05,501 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:07:05,503 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:07:05,505 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:07:05,506 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:07:05,507 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:07:05,508 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:07:05,508 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:07:05,509 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:07:05,510 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:07:05,511 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:07:05,512 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:07:05,513 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:07:05,514 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:07:05,516 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:07:05,517 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:07:05,518 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:07:05,520 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:07:05,521 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:07:05,521 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:07:05,522 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:07:05,522 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:07:05,523 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:07:05,524 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:07:05,525 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:07:05,526 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:07:05,526 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:07:05,527 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:07:05,527 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:07:05,527 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:07:05,529 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:07:05,529 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:07:05,530 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 23:07:05,541 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:07:05,541 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:07:05,542 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:07:05,542 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 23:07:05,543 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 23:07:05,543 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 23:07:05,543 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 23:07:05,543 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:07:05,544 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:07:05,544 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:07:05,544 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:07:05,545 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:07:05,546 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:07:05,546 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:07:05,546 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:07:05,546 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:07:05,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:07:05,546 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:07:05,546 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:07:05,547 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:07:05,547 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 23:07:05,547 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:07:05,547 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:07:05,547 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_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2018-10-26 23:07:05,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:07:05,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:07:05,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:07:05,593 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:07:05,593 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:07:05,594 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-10-26 23:07:05,645 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/data/3f85fe5ad/f4c24f5d9a5b4996a8a98ae909a87698/FLAGc5b84c665 [2018-10-26 23:07:06,021 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:07:06,022 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-10-26 23:07:06,027 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/data/3f85fe5ad/f4c24f5d9a5b4996a8a98ae909a87698/FLAGc5b84c665 [2018-10-26 23:07:06,039 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/data/3f85fe5ad/f4c24f5d9a5b4996a8a98ae909a87698 [2018-10-26 23:07:06,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:07:06,044 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:07:06,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:07:06,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:07:06,049 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:07:06,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a333908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06, skipping insertion in model container [2018-10-26 23:07:06,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:07:06,076 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:07:06,202 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:07:06,205 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:07:06,218 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:07:06,230 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:07:06,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06 WrapperNode [2018-10-26 23:07:06,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:07:06,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:07:06,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:07:06,231 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:07:06,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... [2018-10-26 23:07:06,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:07:06,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:07:06,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:07:06,256 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:07:06,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:06,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:07:06,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:07:06,300 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-10-26 23:07:06,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:07:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 23:07:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-10-26 23:07:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:07:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:07:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:07:06,687 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:07:06,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:06 BoogieIcfgContainer [2018-10-26 23:07:06,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:07:06,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:07:06,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:07:06,692 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:07:06,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:07:06" (1/3) ... [2018-10-26 23:07:06,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f100a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:06, skipping insertion in model container [2018-10-26 23:07:06,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:06" (2/3) ... [2018-10-26 23:07:06,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f100a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:06, skipping insertion in model container [2018-10-26 23:07:06,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:06" (3/3) ... [2018-10-26 23:07:06,696 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0_true-unreach-call_true-termination.c [2018-10-26 23:07:06,705 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:07:06,712 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:07:06,728 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:07:06,755 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:07:06,756 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:07:06,756 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:07:06,756 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:07:06,756 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:07:06,756 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:07:06,757 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:07:06,757 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:07:06,757 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:07:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 23:07:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 23:07:06,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:06,781 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:06,784 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:06,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-10-26 23:07:06,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:06,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:06,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:07:07,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:07:07,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:07:07,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:07:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:07:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:07:07,161 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-10-26 23:07:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:07,272 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-26 23:07:07,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:07:07,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 23:07:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:07,283 INFO L225 Difference]: With dead ends: 30 [2018-10-26 23:07:07,283 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 23:07:07,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:07:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 23:07:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 23:07:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 23:07:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-26 23:07:07,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-26 23:07:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:07,330 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-26 23:07:07,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:07:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-26 23:07:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 23:07:07,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:07,333 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:07,334 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:07,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-10-26 23:07:07,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:07,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:07,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:07,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 23:07:07,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:07,427 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 23:07:07,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:07:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:07,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 23:07:07,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:07,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 23:07:07,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:07:07,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:07:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:07:07,526 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-10-26 23:07:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:07,824 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-26 23:07:07,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:07:07,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-26 23:07:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:07,825 INFO L225 Difference]: With dead ends: 25 [2018-10-26 23:07:07,826 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 23:07:07,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:07:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 23:07:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 23:07:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 23:07:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-26 23:07:07,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-10-26 23:07:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:07,830 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-26 23:07:07,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:07:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-26 23:07:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 23:07:07,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:07,831 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:07,835 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:07,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-10-26 23:07:07,835 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:07,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:07,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:07,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:07,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 23:07:07,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:07,969 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:07,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:07:08,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:07:08,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:08,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 23:07:08,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:08,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 23:07:08,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:07:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:07:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:07:08,088 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-26 23:07:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:08,284 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-26 23:07:08,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:07:08,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-10-26 23:07:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:08,286 INFO L225 Difference]: With dead ends: 28 [2018-10-26 23:07:08,286 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 23:07:08,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:07:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 23:07:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 23:07:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 23:07:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-26 23:07:08,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-10-26 23:07:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:08,296 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-26 23:07:08,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:07:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-26 23:07:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 23:07:08,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:08,297 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:08,297 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:08,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-10-26 23:07:08,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:08,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:08,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 23:07:08,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:08,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:08,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:07:08,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 23:07:08,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:08,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 23:07:08,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:08,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 23:07:08,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 23:07:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 23:07:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:07:08,530 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-10-26 23:07:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:08,908 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-26 23:07:08,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:07:08,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-26 23:07:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:08,909 INFO L225 Difference]: With dead ends: 31 [2018-10-26 23:07:08,910 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 23:07:08,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:07:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 23:07:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-26 23:07:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 23:07:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-26 23:07:08,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-10-26 23:07:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:08,919 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-26 23:07:08,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 23:07:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-26 23:07:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 23:07:08,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:08,922 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:08,922 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:08,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-10-26 23:07:08,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:08,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:08,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:08,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:08,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 23:07:09,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:09,057 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:09,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:07:09,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:07:09,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:09,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 23:07:09,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:09,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 23:07:09,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 23:07:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 23:07:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:07:09,131 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-10-26 23:07:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:09,218 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-26 23:07:09,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 23:07:09,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-26 23:07:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:09,220 INFO L225 Difference]: With dead ends: 34 [2018-10-26 23:07:09,220 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 23:07:09,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-26 23:07:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 23:07:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 23:07:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 23:07:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-26 23:07:09,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-10-26 23:07:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:09,225 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-26 23:07:09,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 23:07:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-26 23:07:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 23:07:09,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:09,226 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:09,227 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:09,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-10-26 23:07:09,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:09,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:09,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 23:07:09,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:09,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:09,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:07:09,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 23:07:09,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:09,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 23:07:09,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:09,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 23:07:09,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 23:07:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 23:07:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:07:09,444 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-26 23:07:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:09,592 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-26 23:07:09,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 23:07:09,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-10-26 23:07:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:09,594 INFO L225 Difference]: With dead ends: 37 [2018-10-26 23:07:09,594 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 23:07:09,595 INFO L605 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 [2018-10-26 23:07:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 23:07:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-26 23:07:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 23:07:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-26 23:07:09,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-10-26 23:07:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-26 23:07:09,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 23:07:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-26 23:07:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-26 23:07:09,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:09,604 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:09,604 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:09,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-10-26 23:07:09,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:09,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:09,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:09,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:09,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 23:07:09,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:09,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:09,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:07:09,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 23:07:09,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:09,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 23:07:09,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:09,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 23:07:09,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 23:07:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 23:07:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:07:09,927 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-10-26 23:07:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:10,103 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-26 23:07:10,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 23:07:10,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-26 23:07:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:10,105 INFO L225 Difference]: With dead ends: 40 [2018-10-26 23:07:10,105 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 23:07:10,106 INFO L605 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 [2018-10-26 23:07:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 23:07:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-26 23:07:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 23:07:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-26 23:07:10,113 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-10-26 23:07:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:10,113 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-26 23:07:10,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 23:07:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-26 23:07:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 23:07:10,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:10,115 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:10,115 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:10,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-10-26 23:07:10,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:10,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:10,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:10,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 23:07:10,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:10,245 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:10,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:10,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 23:07:10,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:10,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 23:07:10,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 23:07:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 23:07:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:07:10,315 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-10-26 23:07:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:10,582 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-26 23:07:10,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 23:07:10,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-10-26 23:07:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:10,584 INFO L225 Difference]: With dead ends: 43 [2018-10-26 23:07:10,584 INFO L226 Difference]: Without dead ends: 39 [2018-10-26 23:07:10,585 INFO L605 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 [2018-10-26 23:07:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-26 23:07:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-26 23:07:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-26 23:07:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-26 23:07:10,592 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-10-26 23:07:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:10,593 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-26 23:07:10,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 23:07:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-26 23:07:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-26 23:07:10,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:10,594 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:10,595 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:10,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-10-26 23:07:10,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:10,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:10,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:10,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 23:07:10,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:10,749 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:10,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:07:10,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:07:10,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:10,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 23:07:10,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:10,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-26 23:07:10,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 23:07:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 23:07:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-26 23:07:10,844 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-10-26 23:07:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:10,968 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-26 23:07:10,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 23:07:10,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-10-26 23:07:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:10,970 INFO L225 Difference]: With dead ends: 46 [2018-10-26 23:07:10,970 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 23:07:10,971 INFO L605 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 [2018-10-26 23:07:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 23:07:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-26 23:07:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 23:07:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-26 23:07:10,978 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-10-26 23:07:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:10,978 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-26 23:07:10,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 23:07:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-26 23:07:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 23:07:10,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:10,979 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:10,980 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:10,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-10-26 23:07:10,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:10,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 23:07:11,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:11,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:11,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:07:11,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 23:07:11,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:11,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 23:07:11,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:11,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 23:07:11,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 23:07:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 23:07:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-26 23:07:11,241 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-10-26 23:07:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:11,420 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-26 23:07:11,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 23:07:11,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-10-26 23:07:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:11,421 INFO L225 Difference]: With dead ends: 49 [2018-10-26 23:07:11,421 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 23:07:11,422 INFO L605 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 [2018-10-26 23:07:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 23:07:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 23:07:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 23:07:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-26 23:07:11,427 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-10-26 23:07:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:11,427 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-26 23:07:11,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 23:07:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-26 23:07:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-26 23:07:11,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:11,428 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:11,429 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:11,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-10-26 23:07:11,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:11,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:11,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:11,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:11,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 23:07:11,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:11,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:11,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:07:11,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:07:11,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:11,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 23:07:11,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:11,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 23:07:11,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 23:07:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 23:07:11,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-10-26 23:07:11,944 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-10-26 23:07:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:12,111 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-26 23:07:12,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 23:07:12,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-26 23:07:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:12,113 INFO L225 Difference]: With dead ends: 52 [2018-10-26 23:07:12,113 INFO L226 Difference]: Without dead ends: 48 [2018-10-26 23:07:12,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-10-26 23:07:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-26 23:07:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-26 23:07:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-26 23:07:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-26 23:07:12,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-10-26 23:07:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:12,120 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-26 23:07:12,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 23:07:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-26 23:07:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 23:07:12,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:12,121 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:12,121 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:12,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-10-26 23:07:12,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:12,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:12,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 23:07:12,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:12,700 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:12,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:07:12,763 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 23:07:12,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:12,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 23:07:12,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:12,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-26 23:07:12,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 23:07:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 23:07:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:07:12,829 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-10-26 23:07:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:13,009 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-26 23:07:13,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 23:07:13,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-10-26 23:07:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:13,011 INFO L225 Difference]: With dead ends: 55 [2018-10-26 23:07:13,011 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 23:07:13,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-10-26 23:07:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 23:07:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-26 23:07:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 23:07:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-26 23:07:13,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-10-26 23:07:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:13,018 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-26 23:07:13,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 23:07:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-26 23:07:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-26 23:07:13,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:13,019 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:13,019 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:13,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-10-26 23:07:13,020 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:13,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:13,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:13,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:13,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 23:07:13,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:13,395 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:13,401 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:07:13,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 23:07:13,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:13,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 23:07:13,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:13,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 23:07:13,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 23:07:13,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 23:07:13,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-10-26 23:07:13,498 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-10-26 23:07:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:13,745 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-26 23:07:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 23:07:13,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-10-26 23:07:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:13,746 INFO L225 Difference]: With dead ends: 58 [2018-10-26 23:07:13,746 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 23:07:13,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-10-26 23:07:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 23:07:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-26 23:07:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-26 23:07:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-26 23:07:13,753 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-10-26 23:07:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:13,753 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-26 23:07:13,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 23:07:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-26 23:07:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-26 23:07:13,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:13,754 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:13,755 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:13,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-10-26 23:07:13,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:13,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:13,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:13,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:13,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 23:07:13,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:13,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:13,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:14,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 23:07:14,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:14,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 23:07:14,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 23:07:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 23:07:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-10-26 23:07:14,056 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-10-26 23:07:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:14,306 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-26 23:07:14,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 23:07:14,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-10-26 23:07:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:14,307 INFO L225 Difference]: With dead ends: 61 [2018-10-26 23:07:14,307 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 23:07:14,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-10-26 23:07:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 23:07:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-26 23:07:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-26 23:07:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-26 23:07:14,314 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-10-26 23:07:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:14,314 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-26 23:07:14,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 23:07:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-26 23:07:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 23:07:14,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:14,316 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:14,316 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:14,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-10-26 23:07:14,316 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:14,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:14,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:14,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:14,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 23:07:14,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:14,514 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:14,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:07:14,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:07:14,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:14,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 23:07:14,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:14,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-26 23:07:14,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 23:07:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 23:07:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-10-26 23:07:14,596 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-26 23:07:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:14,774 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-26 23:07:14,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 23:07:14,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-10-26 23:07:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:14,776 INFO L225 Difference]: With dead ends: 64 [2018-10-26 23:07:14,776 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 23:07:14,776 INFO L605 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 [2018-10-26 23:07:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 23:07:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-26 23:07:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 23:07:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-26 23:07:14,779 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-10-26 23:07:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:14,782 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-26 23:07:14,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 23:07:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-26 23:07:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-26 23:07:14,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:14,783 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:14,784 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:14,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-10-26 23:07:14,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:14,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:14,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:14,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:14,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 23:07:14,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:14,950 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:14,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:07:14,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 23:07:14,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:14,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 23:07:15,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:15,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 23:07:15,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 23:07:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 23:07:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-10-26 23:07:15,051 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-10-26 23:07:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:15,290 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-26 23:07:15,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 23:07:15,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-10-26 23:07:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:15,292 INFO L225 Difference]: With dead ends: 67 [2018-10-26 23:07:15,292 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 23:07:15,293 INFO L605 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 [2018-10-26 23:07:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 23:07:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-26 23:07:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 23:07:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-26 23:07:15,300 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-10-26 23:07:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:15,301 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-26 23:07:15,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 23:07:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-26 23:07:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 23:07:15,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:15,302 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:15,302 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:15,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:15,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-10-26 23:07:15,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:15,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:15,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:15,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:15,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 23:07:15,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:15,703 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:15,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:07:15,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:07:15,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:15,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 23:07:15,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:15,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 23:07:15,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 23:07:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 23:07:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-10-26 23:07:15,824 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-10-26 23:07:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:16,205 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-26 23:07:16,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 23:07:16,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-10-26 23:07:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:16,209 INFO L225 Difference]: With dead ends: 70 [2018-10-26 23:07:16,209 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 23:07:16,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 23:07:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 23:07:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-26 23:07:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-26 23:07:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-26 23:07:16,216 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-10-26 23:07:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:16,217 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-26 23:07:16,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 23:07:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-26 23:07:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-26 23:07:16,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:16,217 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:16,218 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:16,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-10-26 23:07:16,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:16,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:16,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:16,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:16,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-26 23:07:16,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:16,491 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:16,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:07:16,556 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 23:07:16,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:16,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-26 23:07:16,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:16,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-26 23:07:16,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 23:07:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 23:07:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:07:16,614 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-10-26 23:07:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:16,868 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-26 23:07:16,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 23:07:16,868 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-10-26 23:07:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:16,869 INFO L225 Difference]: With dead ends: 73 [2018-10-26 23:07:16,869 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 23:07:16,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 23:07:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 23:07:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-26 23:07:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-26 23:07:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-26 23:07:16,874 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-10-26 23:07:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:16,874 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-26 23:07:16,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 23:07:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-26 23:07:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-26 23:07:16,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:16,875 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:16,875 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:16,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-10-26 23:07:16,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:16,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:16,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:16,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:16,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-26 23:07:17,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:17,140 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:17,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:07:17,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 23:07:17,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:17,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-26 23:07:17,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:17,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-26 23:07:17,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 23:07:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 23:07:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-10-26 23:07:17,276 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-10-26 23:07:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:17,723 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-26 23:07:17,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 23:07:17,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-10-26 23:07:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:17,725 INFO L225 Difference]: With dead ends: 76 [2018-10-26 23:07:17,725 INFO L226 Difference]: Without dead ends: 72 [2018-10-26 23:07:17,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 23:07:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-26 23:07:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-26 23:07:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-26 23:07:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-26 23:07:17,730 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-10-26 23:07:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:17,730 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-26 23:07:17,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 23:07:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-26 23:07:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 23:07:17,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:17,731 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:17,732 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:17,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-10-26 23:07:17,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:17,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:17,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:17,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:17,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-26 23:07:18,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:18,020 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:18,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:18,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-26 23:07:18,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:18,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 23:07:18,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 23:07:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 23:07:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-10-26 23:07:18,136 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-10-26 23:07:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:18,570 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-26 23:07:18,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 23:07:18,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-10-26 23:07:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:18,572 INFO L225 Difference]: With dead ends: 79 [2018-10-26 23:07:18,572 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 23:07:18,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 23:07:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 23:07:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-26 23:07:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-26 23:07:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-26 23:07:18,575 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-10-26 23:07:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:18,577 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-26 23:07:18,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 23:07:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-26 23:07:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-26 23:07:18,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:18,578 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:18,578 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:18,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:18,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-10-26 23:07:18,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:18,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:18,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:07:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-10-26 23:07:20,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:20,360 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:20,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:07:20,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:07:20,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:20,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-10-26 23:07:20,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:20,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 53 [2018-10-26 23:07:20,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 23:07:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 23:07:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2645, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 23:07:20,751 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 53 states. [2018-10-26 23:07:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:23,397 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-26 23:07:23,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 23:07:23,397 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 133 [2018-10-26 23:07:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:23,398 INFO L225 Difference]: With dead ends: 82 [2018-10-26 23:07:23,398 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 23:07:23,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=484, Invalid=8446, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 23:07:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 23:07:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-26 23:07:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 23:07:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-26 23:07:23,406 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-10-26 23:07:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:23,407 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-26 23:07:23,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 23:07:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-26 23:07:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 23:07:23,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:07:23,408 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:07:23,408 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:07:23,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:07:23,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-10-26 23:07:23,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:07:23,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:07:23,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:23,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:07:23,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:07:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:07:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-10-26 23:07:24,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:07:24,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/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 [2018-10-26 23:07:24,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:07:24,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-26 23:07:24,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:07:24,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:07:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-10-26 23:07:24,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:07:24,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-26 23:07:24,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 23:07:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 23:07:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-10-26 23:07:24,474 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 25 states. [2018-10-26 23:07:24,809 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-10-26 23:07:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:07:24,895 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-10-26 23:07:24,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 23:07:24,900 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 139 [2018-10-26 23:07:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:07:24,900 INFO L225 Difference]: With dead ends: 78 [2018-10-26 23:07:24,900 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 23:07:24,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 23:07:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 23:07:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 23:07:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 23:07:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 23:07:24,902 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-10-26 23:07:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:07:24,902 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 23:07:24,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 23:07:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 23:07:24,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 23:07:24,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 23:07:24,957 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 23:07:24,958 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-10-26 23:07:24,958 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-10-26 23:07:24,959 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-26 23:07:24,959 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-10-26 23:07:24,959 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-10-26 23:07:24,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:07:24 BoogieIcfgContainer [2018-10-26 23:07:24,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:07:24,962 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:07:24,962 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:07:24,962 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:07:24,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:06" (3/4) ... [2018-10-26 23:07:24,967 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 23:07:24,974 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 23:07:24,974 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-10-26 23:07:24,975 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 23:07:24,979 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 23:07:24,979 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-26 23:07:24,979 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 23:07:25,017 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_dc3feef9-01a1-454a-ab28-0d2c5998a3c3/bin-2019/uautomizer/witness.graphml [2018-10-26 23:07:25,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:07:25,018 INFO L168 Benchmark]: Toolchain (without parser) took 18975.75 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 378.0 MB). Free memory was 958.4 MB in the beginning and 971.1 MB in the end (delta: -12.6 MB). Peak memory consumption was 365.4 MB. Max. memory is 11.5 GB. [2018-10-26 23:07:25,019 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:07:25,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.89 ms. Allocated memory is still 1.0 GB. Free memory was 958.4 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:07:25,021 INFO L168 Benchmark]: Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:07:25,021 INFO L168 Benchmark]: RCFGBuilder took 431.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-26 23:07:25,022 INFO L168 Benchmark]: TraceAbstraction took 18273.24 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 231.2 MB). Free memory was 1.1 GB in the beginning and 971.1 MB in the end (delta: 163.1 MB). Peak memory consumption was 394.3 MB. Max. memory is 11.5 GB. [2018-10-26 23:07:25,022 INFO L168 Benchmark]: Witness Printer took 55.59 ms. Allocated memory is still 1.4 GB. Free memory is still 971.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:07:25,024 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 185.89 ms. Allocated memory is still 1.0 GB. Free memory was 958.4 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 431.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18273.24 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 231.2 MB). Free memory was 1.1 GB in the beginning and 971.1 MB in the end (delta: 163.1 MB). Peak memory consumption was 394.3 MB. Max. memory is 11.5 GB. * Witness Printer took 55.59 ms. Allocated memory is still 1.4 GB. Free memory is still 971.1 MB. There was no memory consumed. 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, 18.2s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 7.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 576 SDslu, 3156 SDs, 0 SdLazy, 3698 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2525 GetRequests, 1907 SyntacticMatches, 21 SemanticMatches, 597 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 28 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 971208 SizeOfPredicates, 276 NumberOfNonLiveVariables, 4914 ConjunctsInSsa, 677 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 11387/20328 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...