./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20_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_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:43:17,148 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:43:17,150 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:43:17,158 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:43:17,158 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:43:17,159 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:43:17,160 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:43:17,161 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:43:17,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:43:17,163 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:43:17,164 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:43:17,164 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:43:17,165 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:43:17,165 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:43:17,166 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:43:17,167 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:43:17,167 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:43:17,168 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:43:17,170 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:43:17,171 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:43:17,172 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:43:17,173 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:43:17,174 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:43:17,175 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:43:17,175 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:43:17,175 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:43:17,176 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:43:17,177 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:43:17,177 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:43:17,178 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:43:17,178 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:43:17,179 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:43:17,179 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:43:17,179 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:43:17,180 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:43:17,181 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:43:17,181 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 20:43:17,192 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:43:17,192 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:43:17,193 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:43:17,193 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:43:17,194 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:43:17,194 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:43:17,194 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 20:43:17,194 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:43:17,195 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:43:17,196 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:43:17,196 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:43:17,196 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:43:17,196 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:43:17,197 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:43:17,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:43:17,197 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:43:17,197 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:43:17,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:43:17,197 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:43:17,198 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:43:17,201 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:43:17,202 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 20:43:17,202 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:43:17,202 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:43:17,202 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_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 -> 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 [2018-10-26 20:43:17,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:43:17,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:43:17,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:43:17,245 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:43:17,246 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:43:17,246 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-10-26 20:43:17,286 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/data/66967b0fe/5f2ee3896d78436fb4f563cfa495b9ae/FLAG4b3335df5 [2018-10-26 20:43:17,654 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:43:17,655 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-10-26 20:43:17,659 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/data/66967b0fe/5f2ee3896d78436fb4f563cfa495b9ae/FLAG4b3335df5 [2018-10-26 20:43:17,669 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/data/66967b0fe/5f2ee3896d78436fb4f563cfa495b9ae [2018-10-26 20:43:17,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:43:17,673 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 20:43:17,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:43:17,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:43:17,676 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:43:17,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501b0c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17, skipping insertion in model container [2018-10-26 20:43:17,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:43:17,697 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:43:17,796 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:43:17,798 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:43:17,807 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:43:17,817 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:43:17,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17 WrapperNode [2018-10-26 20:43:17,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:43:17,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:43:17,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:43:17,818 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:43:17,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... [2018-10-26 20:43:17,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:43:17,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:43:17,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:43:17,838 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:43:17,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:43:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:43:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-10-26 20:43:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:43:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:43:18,171 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:43:18,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:43:18 BoogieIcfgContainer [2018-10-26 20:43:18,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:43:18,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:43:18,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:43:18,175 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:43:18,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:43:17" (1/3) ... [2018-10-26 20:43:18,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df7709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:43:18, skipping insertion in model container [2018-10-26 20:43:18,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:43:17" (2/3) ... [2018-10-26 20:43:18,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df7709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:43:18, skipping insertion in model container [2018-10-26 20:43:18,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:43:18" (3/3) ... [2018-10-26 20:43:18,178 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_true-unreach-call_true-termination.c [2018-10-26 20:43:18,186 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:43:18,193 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:43:18,208 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:43:18,240 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:43:18,240 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:43:18,241 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:43:18,241 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:43:18,241 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:43:18,241 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:43:18,241 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:43:18,241 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:43:18,241 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:43:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 20:43:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 20:43:18,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:18,265 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:43:18,271 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:18,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-10-26 20:43:18,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:18,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:18,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:18,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:18,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:18,578 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 20:43:18,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:43:18,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 20:43:18,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:43:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:43:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:43:18,593 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-10-26 20:43:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:18,712 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-26 20:43:18,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:43:18,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 20:43:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:18,720 INFO L225 Difference]: With dead ends: 30 [2018-10-26 20:43:18,720 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 20:43:18,723 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 20:43:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 20:43:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 20:43:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 20:43:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-26 20:43:18,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-26 20:43:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:18,759 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-26 20:43:18,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:43:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-26 20:43:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 20:43:18,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:18,761 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 20:43:18,761 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:18,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-10-26 20:43:18,761 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:18,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:18,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:18,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:18,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:18,837 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 20:43:18,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:18,837 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:18,853 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 20:43:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:18,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:18,939 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 20:43:18,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:18,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 20:43:18,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 20:43:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 20:43:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:43:18,963 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-10-26 20:43:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:19,168 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-26 20:43:19,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 20:43:19,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-26 20:43:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:19,169 INFO L225 Difference]: With dead ends: 25 [2018-10-26 20:43:19,169 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 20:43:19,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:43:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 20:43:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 20:43:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:43:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-26 20:43:19,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-10-26 20:43:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:19,175 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-26 20:43:19,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 20:43:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-26 20:43:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 20:43:19,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:19,176 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 20:43:19,176 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:19,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-10-26 20:43:19,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:19,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:19,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:19,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:19,370 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 20:43:19,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:19,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:19,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:43:19,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:43:19,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:19,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:19,419 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 20:43:19,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:19,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 20:43:19,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 20:43:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 20:43:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-26 20:43:19,439 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-26 20:43:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:19,587 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-26 20:43:19,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 20:43:19,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-10-26 20:43:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:19,588 INFO L225 Difference]: With dead ends: 28 [2018-10-26 20:43:19,594 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 20:43:19,595 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 20:43:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 20:43:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 20:43:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 20:43:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-26 20:43:19,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-10-26 20:43:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:19,600 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-26 20:43:19,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 20:43:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-26 20:43:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 20:43:19,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:19,601 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 20:43:19,602 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:19,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-10-26 20:43:19,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:19,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:19,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:19,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:19,723 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 20:43:19,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:19,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:19,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:43:19,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 20:43:19,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:19,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:19,786 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 20:43:19,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:19,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 20:43:19,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:43:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:43:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:43:19,803 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-10-26 20:43:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:19,884 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-26 20:43:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 20:43:19,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-26 20:43:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:19,887 INFO L225 Difference]: With dead ends: 31 [2018-10-26 20:43:19,887 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 20:43:19,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:43:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 20:43:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-26 20:43:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 20:43:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-26 20:43:19,893 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-10-26 20:43:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:19,894 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-26 20:43:19,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:43:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-26 20:43:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 20:43:19,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:19,895 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 20:43:19,895 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:19,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-10-26 20:43:19,895 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:19,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:19,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:19,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:20,185 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 20:43:20,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:20,185 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:20,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:43:20,206 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:43:20,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:20,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:20,221 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 20:43:20,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:20,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 20:43:20,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 20:43:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 20:43:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 20:43:20,248 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-10-26 20:43:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:20,363 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-26 20:43:20,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 20:43:20,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-26 20:43:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:20,365 INFO L225 Difference]: With dead ends: 34 [2018-10-26 20:43:20,365 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 20:43:20,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-26 20:43:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 20:43:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 20:43:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 20:43:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-26 20:43:20,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-10-26 20:43:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:20,369 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-26 20:43:20,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 20:43:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-26 20:43:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 20:43:20,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:20,371 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 20:43:20,371 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:20,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-10-26 20:43:20,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:20,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:20,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:20,502 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 20:43:20,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:20,502 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:20,508 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:43:20,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 20:43:20,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:20,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:20,568 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 20:43:20,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:20,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 20:43:20,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 20:43:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 20:43:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-26 20:43:20,584 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-26 20:43:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:20,703 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-26 20:43:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 20:43:20,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-10-26 20:43:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:20,704 INFO L225 Difference]: With dead ends: 37 [2018-10-26 20:43:20,704 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 20:43:20,705 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 20:43:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 20:43:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-26 20:43:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 20:43:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-26 20:43:20,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-10-26 20:43:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:20,710 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-26 20:43:20,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 20:43:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-26 20:43:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-26 20:43:20,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:20,712 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 20:43:20,712 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:20,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-10-26 20:43:20,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:20,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:20,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:20,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:20,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:20,863 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 20:43:20,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:20,863 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:20,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:43:20,982 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 20:43:20,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:20,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:21,017 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 20:43:21,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:21,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 20:43:21,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 20:43:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 20:43:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-26 20:43:21,040 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-10-26 20:43:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:21,169 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-26 20:43:21,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 20:43:21,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-26 20:43:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:21,172 INFO L225 Difference]: With dead ends: 40 [2018-10-26 20:43:21,172 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 20:43:21,172 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 20:43:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 20:43:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-26 20:43:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 20:43:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-26 20:43:21,180 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-10-26 20:43:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:21,181 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-26 20:43:21,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 20:43:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-26 20:43:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 20:43:21,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:21,182 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 20:43:21,182 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:21,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:21,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-10-26 20:43:21,183 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:21,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:21,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:21,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:21,312 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 20:43:21,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:21,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:21,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:21,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:21,379 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 20:43:21,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:21,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 20:43:21,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 20:43:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 20:43:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:43:21,396 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-10-26 20:43:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:21,613 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-26 20:43:21,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 20:43:21,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-10-26 20:43:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:21,615 INFO L225 Difference]: With dead ends: 43 [2018-10-26 20:43:21,615 INFO L226 Difference]: Without dead ends: 39 [2018-10-26 20:43:21,616 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 20:43:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-26 20:43:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-26 20:43:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-26 20:43:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-26 20:43:21,620 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-10-26 20:43:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:21,620 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-26 20:43:21,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 20:43:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-26 20:43:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-26 20:43:21,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:21,622 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 20:43:21,623 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:21,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-10-26 20:43:21,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:21,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:21,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:21,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:21,761 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 20:43:21,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:21,761 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:21,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:43:21,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:43:21,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:21,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:21,835 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 20:43:21,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:21,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-26 20:43:21,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 20:43:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 20:43:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-26 20:43:21,852 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-10-26 20:43:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:21,979 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-26 20:43:21,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 20:43:21,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-10-26 20:43:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:21,982 INFO L225 Difference]: With dead ends: 46 [2018-10-26 20:43:21,982 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 20:43:21,982 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 20:43:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 20:43:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-26 20:43:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 20:43:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-26 20:43:21,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-10-26 20:43:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:21,986 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-26 20:43:21,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 20:43:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-26 20:43:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 20:43:21,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:21,989 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 20:43:21,989 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:21,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-10-26 20:43:21,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:21,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:21,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:21,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:22,115 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 20:43:22,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:22,115 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:22,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:43:22,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 20:43:22,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:22,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:22,297 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 20:43:22,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:22,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 20:43:22,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 20:43:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 20:43:22,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-26 20:43:22,323 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-10-26 20:43:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:22,640 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-26 20:43:22,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 20:43:22,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-10-26 20:43:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:22,641 INFO L225 Difference]: With dead ends: 49 [2018-10-26 20:43:22,642 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 20:43:22,642 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 20:43:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 20:43:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 20:43:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 20:43:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-26 20:43:22,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-10-26 20:43:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:22,645 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-26 20:43:22,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 20:43:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-26 20:43:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-26 20:43:22,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:22,651 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 20:43:22,651 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:22,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-10-26 20:43:22,651 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:22,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:22,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:22,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:22,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:22,796 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 20:43:22,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:22,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:22,803 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:43:22,839 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:43:22,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:22,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:22,866 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 20:43:22,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:22,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 20:43:22,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 20:43:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 20:43:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-10-26 20:43:22,884 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-10-26 20:43:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:23,101 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-26 20:43:23,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 20:43:23,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-26 20:43:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:23,103 INFO L225 Difference]: With dead ends: 52 [2018-10-26 20:43:23,103 INFO L226 Difference]: Without dead ends: 48 [2018-10-26 20:43:23,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-10-26 20:43:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-26 20:43:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-26 20:43:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-26 20:43:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-26 20:43:23,107 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-10-26 20:43:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:23,107 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-26 20:43:23,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 20:43:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-26 20:43:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 20:43:23,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:23,108 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 20:43:23,108 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:23,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-10-26 20:43:23,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:23,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:23,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:23,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:23,324 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 20:43:23,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:23,325 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:23,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:43:23,359 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 20:43:23,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:23,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:23,389 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 20:43:23,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:23,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-26 20:43:23,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 20:43:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 20:43:23,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-10-26 20:43:23,406 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-10-26 20:43:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:23,685 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-26 20:43:23,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 20:43:23,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-10-26 20:43:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:23,686 INFO L225 Difference]: With dead ends: 55 [2018-10-26 20:43:23,687 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 20:43:23,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-10-26 20:43:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 20:43:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-26 20:43:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 20:43:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-26 20:43:23,700 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-10-26 20:43:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:23,700 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-26 20:43:23,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 20:43:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-26 20:43:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-26 20:43:23,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:23,701 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 20:43:23,701 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:23,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-10-26 20:43:23,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:23,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:23,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:23,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:23,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:24,027 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 20:43:24,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:24,027 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:24,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:43:24,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 20:43:24,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:24,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:24,147 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 20:43:24,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:24,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 20:43:24,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 20:43:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 20:43:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-10-26 20:43:24,171 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-10-26 20:43:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:24,398 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-26 20:43:24,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 20:43:24,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-10-26 20:43:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:24,399 INFO L225 Difference]: With dead ends: 58 [2018-10-26 20:43:24,399 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 20:43:24,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-10-26 20:43:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 20:43:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-26 20:43:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-26 20:43:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-26 20:43:24,405 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-10-26 20:43:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:24,405 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-26 20:43:24,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 20:43:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-26 20:43:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-26 20:43:24,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:24,408 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 20:43:24,408 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:24,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-10-26 20:43:24,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:24,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:24,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:24,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:24,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:24,922 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 20:43:24,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:24,922 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:24,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:24,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:25,003 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 20:43:25,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:25,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 20:43:25,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 20:43:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 20:43:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-10-26 20:43:25,020 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-10-26 20:43:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:25,313 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-26 20:43:25,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 20:43:25,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-10-26 20:43:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:25,315 INFO L225 Difference]: With dead ends: 61 [2018-10-26 20:43:25,315 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 20:43:25,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-10-26 20:43:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 20:43:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-26 20:43:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-26 20:43:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-26 20:43:25,324 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-10-26 20:43:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:25,325 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-26 20:43:25,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 20:43:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-26 20:43:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 20:43:25,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:25,328 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 20:43:25,328 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:25,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:25,328 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-10-26 20:43:25,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:25,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:25,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:25,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:25,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:25,585 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 20:43:25,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:25,585 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:25,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:43:25,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:43:25,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:25,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:25,637 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 20:43:25,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:25,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-26 20:43:25,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 20:43:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 20:43:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-10-26 20:43:25,654 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-26 20:43:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:25,874 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-26 20:43:25,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 20:43:25,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-10-26 20:43:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:25,875 INFO L225 Difference]: With dead ends: 64 [2018-10-26 20:43:25,875 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 20:43:25,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 20:43:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 20:43:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-26 20:43:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 20:43:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-26 20:43:25,880 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-10-26 20:43:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:25,881 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-26 20:43:25,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 20:43:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-26 20:43:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-26 20:43:25,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:25,886 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 20:43:25,886 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:25,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-10-26 20:43:25,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:25,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:25,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:25,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:25,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:26,094 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 20:43:26,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:26,095 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:26,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:43:26,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 20:43:26,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:26,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:26,169 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 20:43:26,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:26,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 20:43:26,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 20:43:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 20:43:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-10-26 20:43:26,186 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-10-26 20:43:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:26,398 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-26 20:43:26,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 20:43:26,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-10-26 20:43:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:26,399 INFO L225 Difference]: With dead ends: 67 [2018-10-26 20:43:26,399 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 20:43:26,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 20:43:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 20:43:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-26 20:43:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 20:43:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-26 20:43:26,404 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-10-26 20:43:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:26,404 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-26 20:43:26,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 20:43:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-26 20:43:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 20:43:26,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:26,405 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 20:43:26,405 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:26,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-10-26 20:43:26,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:26,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:26,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:26,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:26,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:26,576 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 20:43:26,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:26,577 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:26,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:43:26,606 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:43:26,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:26,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:26,644 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 20:43:26,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:26,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 20:43:26,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 20:43:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 20:43:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-10-26 20:43:26,675 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-10-26 20:43:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:26,933 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-26 20:43:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 20:43:26,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-10-26 20:43:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:26,935 INFO L225 Difference]: With dead ends: 70 [2018-10-26 20:43:26,935 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 20:43:26,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 20:43:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 20:43:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-26 20:43:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-26 20:43:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-26 20:43:26,939 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-10-26 20:43:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:26,940 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-26 20:43:26,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 20:43:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-26 20:43:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-26 20:43:26,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:26,941 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 20:43:26,941 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:26,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-10-26 20:43:26,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:26,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:26,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:27,136 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 20:43:27,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:27,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:27,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:43:27,179 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 20:43:27,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:27,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:27,205 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 20:43:27,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:27,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-26 20:43:27,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 20:43:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 20:43:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-10-26 20:43:27,225 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-10-26 20:43:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:27,491 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-26 20:43:27,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 20:43:27,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-10-26 20:43:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:27,492 INFO L225 Difference]: With dead ends: 73 [2018-10-26 20:43:27,493 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 20:43:27,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 20:43:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 20:43:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-26 20:43:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-26 20:43:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-26 20:43:27,496 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-10-26 20:43:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:27,496 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-26 20:43:27,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 20:43:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-26 20:43:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-26 20:43:27,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:27,497 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 20:43:27,497 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:27,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-10-26 20:43:27,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:27,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:27,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:27,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:27,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:27,757 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 20:43:27,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:27,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 20:43:27,773 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:43:27,814 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 20:43:27,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:27,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:27,859 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 20:43:27,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:27,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-26 20:43:27,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 20:43:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 20:43:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-10-26 20:43:27,880 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-10-26 20:43:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:28,301 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-26 20:43:28,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 20:43:28,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-10-26 20:43:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:28,302 INFO L225 Difference]: With dead ends: 76 [2018-10-26 20:43:28,303 INFO L226 Difference]: Without dead ends: 72 [2018-10-26 20:43:28,303 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 20:43:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-26 20:43:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-26 20:43:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-26 20:43:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-26 20:43:28,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-10-26 20:43:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:28,310 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-26 20:43:28,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 20:43:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-26 20:43:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 20:43:28,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:28,311 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 20:43:28,311 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:28,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:28,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-10-26 20:43:28,312 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:28,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:28,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:28,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:28,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:28,763 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 20:43:28,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:28,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:28,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:28,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:28,844 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 20:43:28,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:28,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 20:43:28,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 20:43:28,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 20:43:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-10-26 20:43:28,871 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-10-26 20:43:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:29,386 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-26 20:43:29,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 20:43:29,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-10-26 20:43:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:29,388 INFO L225 Difference]: With dead ends: 79 [2018-10-26 20:43:29,388 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 20:43:29,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 20:43:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 20:43:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-26 20:43:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-26 20:43:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-26 20:43:29,392 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-10-26 20:43:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:29,392 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-26 20:43:29,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 20:43:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-26 20:43:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-26 20:43:29,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:29,393 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 20:43:29,393 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:29,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-10-26 20:43:29,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:29,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:29,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:29,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:43:29,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-26 20:43:30,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:43:30,501 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/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 20:43:30,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:43:30,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:43:30,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:43:30,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:43:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-26 20:43:30,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:43:30,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-26 20:43:30,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 20:43:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 20:43:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 20:43:30,632 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2018-10-26 20:43:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:31,176 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-26 20:43:31,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 20:43:31,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-10-26 20:43:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:31,191 INFO L225 Difference]: With dead ends: 82 [2018-10-26 20:43:31,191 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 20:43:31,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 20:43:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 20:43:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-26 20:43:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 20:43:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-26 20:43:31,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-10-26 20:43:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:31,215 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-26 20:43:31,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 20:43:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-26 20:43:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 20:43:31,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:43:31,216 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 20:43:31,216 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:43:31,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:43:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-10-26 20:43:31,217 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:43:31,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:43:31,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:31,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:43:31,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:43:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:43:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-26 20:43:32,251 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:43:32,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2018-10-26 20:43:32,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 20:43:32,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 20:43:32,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-10-26 20:43:32,252 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-10-26 20:43:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:43:32,639 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-10-26 20:43:32,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 20:43:32,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-10-26 20:43:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:43:32,644 INFO L225 Difference]: With dead ends: 78 [2018-10-26 20:43:32,644 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 20:43:32,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 20:43:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 20:43:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 20:43:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 20:43:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 20:43:32,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-10-26 20:43:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:43:32,645 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 20:43:32,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 20:43:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 20:43:32,645 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 20:43:32,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 20:43:32,695 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 20:43:32,696 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-10-26 20:43:32,696 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-10-26 20:43:32,697 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-10-26 20:43:32,697 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-10-26 20:43:32,697 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-10-26 20:43:32,697 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-10-26 20:43:32,697 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-26 20:43:32,697 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-10-26 20:43:32,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:43:32 BoogieIcfgContainer [2018-10-26 20:43:32,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:43:32,699 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:43:32,699 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:43:32,699 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:43:32,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:43:18" (3/4) ... [2018-10-26 20:43:32,707 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 20:43:32,712 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 20:43:32,713 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 20:43:32,713 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-10-26 20:43:32,716 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 20:43:32,717 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-26 20:43:32,717 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 20:43:32,742 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_eea4d719-4e22-4cde-9951-ebfbb32d75f2/bin-2019/uautomizer/witness.graphml [2018-10-26 20:43:32,742 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:43:32,743 INFO L168 Benchmark]: Toolchain (without parser) took 15070.73 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 241.2 MB). Free memory was 958.5 MB in the beginning and 1.1 GB in the end (delta: -123.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 11.5 GB. [2018-10-26 20:43:32,744 INFO L168 Benchmark]: CDTParser took 0.14 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 20:43:32,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.18 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 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 20:43:32,745 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 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 20:43:32,745 INFO L168 Benchmark]: RCFGBuilder took 333.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -200.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:43:32,745 INFO L168 Benchmark]: TraceAbstraction took 14526.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.6 MB). Peak memory consumption was 145.1 MB. Max. memory is 11.5 GB. [2018-10-26 20:43:32,746 INFO L168 Benchmark]: Witness Printer took 43.11 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2018-10-26 20:43:32,751 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.18 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 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 20.05 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 333.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -200.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14526.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.6 MB). Peak memory consumption was 145.1 MB. Max. memory is 11.5 GB. * Witness Printer took 43.11 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 14.4s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 5.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 370 SDtfs, 527 SDslu, 4040 SDs, 0 SdLazy, 2636 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2304 GetRequests, 1753 SyntacticMatches, 2 SemanticMatches, 549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 8.3s 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, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 3192 NumberOfCodeBlocks, 3192 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 3150 ConstructedInterpolants, 0 QuantifiedInterpolants, 787512 SizeOfPredicates, 229 NumberOfNonLiveVariables, 3560 ConjunctsInSsa, 543 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 10164/18984 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...