./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25_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_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/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 980109aaf5797fcdc56688cd1127831babfd66a2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 12:57:01,179 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:57:01,181 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:57:01,187 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:57:01,187 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:57:01,188 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:57:01,188 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:57:01,189 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:57:01,190 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:57:01,190 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:57:01,191 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:57:01,191 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:57:01,192 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:57:01,192 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:57:01,193 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:57:01,194 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:57:01,194 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:57:01,196 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:57:01,197 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:57:01,198 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:57:01,198 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:57:01,199 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:57:01,200 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:57:01,200 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:57:01,200 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:57:01,201 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:57:01,201 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:57:01,202 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:57:01,202 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:57:01,203 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:57:01,203 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:57:01,204 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:57:01,204 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:57:01,204 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:57:01,205 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:57:01,205 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:57:01,205 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 12:57:01,212 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:57:01,212 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:57:01,213 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:57:01,213 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:57:01,213 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:57:01,213 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:57:01,214 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:57:01,214 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:57:01,215 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:57:01,215 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:57:01,216 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:57:01,216 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:57:01,217 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:57:01,217 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_addb7c69-48fc-4990-a1ec-cdacace52c6f/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 -> 980109aaf5797fcdc56688cd1127831babfd66a2 [2018-11-10 12:57:01,241 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:57:01,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:57:01,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:57:01,254 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:57:01,254 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:57:01,255 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-11-10 12:57:01,295 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/data/f9d9d22d1/fecece3678d94755add2f44800a6ed18/FLAG72c72ff7e [2018-11-10 12:57:01,595 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:57:01,596 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-11-10 12:57:01,599 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/data/f9d9d22d1/fecece3678d94755add2f44800a6ed18/FLAG72c72ff7e [2018-11-10 12:57:01,609 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/data/f9d9d22d1/fecece3678d94755add2f44800a6ed18 [2018-11-10 12:57:01,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:57:01,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:57:01,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:57:01,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:57:01,615 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:57:01,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41dc5def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01, skipping insertion in model container [2018-11-10 12:57:01,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:57:01,639 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:57:01,742 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:57:01,744 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:57:01,753 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:57:01,762 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:57:01,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01 WrapperNode [2018-11-10 12:57:01,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:57:01,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:57:01,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:57:01,763 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:57:01,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... [2018-11-10 12:57:01,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:57:01,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:57:01,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:57:01,779 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:57:01,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:57:01,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:57:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:57:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 12:57:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:57:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 12:57:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:57:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 12:57:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:57:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:57:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:57:01,948 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:57:01,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:57:01 BoogieIcfgContainer [2018-11-10 12:57:01,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:57:01,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:57:01,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:57:01,951 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:57:01,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:57:01" (1/3) ... [2018-11-10 12:57:01,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e534167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:57:01, skipping insertion in model container [2018-11-10 12:57:01,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:57:01" (2/3) ... [2018-11-10 12:57:01,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e534167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:57:01, skipping insertion in model container [2018-11-10 12:57:01,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:57:01" (3/3) ... [2018-11-10 12:57:01,953 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_true-unreach-call_true-termination.c [2018-11-10 12:57:01,958 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:57:01,963 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:57:01,972 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:57:01,991 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:57:01,991 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:57:01,991 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:57:01,991 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:57:01,991 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:57:01,991 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:57:01,992 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:57:01,992 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:57:01,992 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:57:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 12:57:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 12:57:02,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:02,007 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:02,009 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:02,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 12:57:02,013 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:02,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:02,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:02,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:57:02,142 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:57:02,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 12:57:02,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 12:57:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:57:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:57:02,159 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 12:57:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:02,221 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 12:57:02,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:57:02,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 12:57:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:02,228 INFO L225 Difference]: With dead ends: 30 [2018-11-10 12:57:02,229 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 12:57:02,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:57:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 12:57:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 12:57:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 12:57:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 12:57:02,255 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 12:57:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:02,255 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 12:57:02,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 12:57:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 12:57:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:57:02,257 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:02,257 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:02,257 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:02,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 12:57:02,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:02,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:02,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:02,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:57:02,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:02,318 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:02,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:57:02,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:02,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 12:57:02,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 12:57:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:57:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:57:02,386 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 12:57:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:02,444 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 12:57:02,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 12:57:02,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 12:57:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:02,445 INFO L225 Difference]: With dead ends: 25 [2018-11-10 12:57:02,445 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 12:57:02,446 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 [2018-11-10 12:57:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 12:57:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 12:57:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 12:57:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 12:57:02,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 12:57:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:02,449 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 12:57:02,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 12:57:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 12:57:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 12:57:02,450 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:02,450 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:02,450 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:02,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 12:57:02,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:02,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:02,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:02,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:57:02,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:02,522 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:02,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:57:02,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:57:02,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:02,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:57:02,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:02,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 12:57:02,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 12:57:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 12:57:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:57:02,584 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 12:57:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:02,633 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 12:57:02,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:57:02,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 12:57:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:02,634 INFO L225 Difference]: With dead ends: 28 [2018-11-10 12:57:02,634 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 12:57:02,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 12:57:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 12:57:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 12:57:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 12:57:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 12:57:02,638 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 12:57:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:02,638 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 12:57:02,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 12:57:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 12:57:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 12:57:02,639 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:02,639 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:02,639 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:02,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 12:57:02,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:02,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:02,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:02,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:57:02,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:02,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:02,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:57:02,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 12:57:02,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:02,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:57:02,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:02,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 12:57:02,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 12:57:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 12:57:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:57:02,771 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 12:57:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:02,814 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 12:57:02,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 12:57:02,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 12:57:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:02,815 INFO L225 Difference]: With dead ends: 31 [2018-11-10 12:57:02,815 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 12:57:02,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 12:57:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 12:57:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 12:57:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 12:57:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 12:57:02,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 12:57:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:02,820 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 12:57:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 12:57:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 12:57:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 12:57:02,821 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:02,822 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:02,822 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:02,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 12:57:02,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:02,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:02,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:02,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:57:02,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:02,903 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:02,914 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:57:02,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:57:02,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:02,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:57:02,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:02,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 12:57:02,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 12:57:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 12:57:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:57:02,956 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 12:57:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:03,026 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 12:57:03,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 12:57:03,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 12:57:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:03,028 INFO L225 Difference]: With dead ends: 34 [2018-11-10 12:57:03,028 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 12:57:03,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 12:57:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 12:57:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 12:57:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 12:57:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 12:57:03,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 12:57:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:03,033 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 12:57:03,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 12:57:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 12:57:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 12:57:03,034 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:03,034 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:03,034 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:03,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 12:57:03,035 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:03,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:03,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:03,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:57:03,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:03,128 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:03,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:57:03,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 12:57:03,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:03,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:57:03,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:03,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 12:57:03,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 12:57:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 12:57:03,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 12:57:03,181 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 12:57:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:03,267 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 12:57:03,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 12:57:03,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 12:57:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:03,268 INFO L225 Difference]: With dead ends: 37 [2018-11-10 12:57:03,268 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 12:57:03,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-10 12:57:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 12:57:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 12:57:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 12:57:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 12:57:03,273 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 12:57:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:03,274 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 12:57:03,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 12:57:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 12:57:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 12:57:03,274 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:03,274 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:03,275 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:03,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 12:57:03,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:03,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:03,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:03,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:57:03,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:03,353 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:03,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:57:03,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 12:57:03,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:03,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:57:03,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:03,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 12:57:03,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 12:57:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 12:57:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:57:03,423 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 12:57:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:03,486 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 12:57:03,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 12:57:03,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 12:57:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:03,488 INFO L225 Difference]: With dead ends: 40 [2018-11-10 12:57:03,488 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 12:57:03,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-10 12:57:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 12:57:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 12:57:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 12:57:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 12:57:03,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 12:57:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:03,494 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 12:57:03,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 12:57:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 12:57:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 12:57:03,494 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:03,494 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:03,495 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:03,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 12:57:03,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:03,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:03,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:03,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:57:03,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:03,576 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:03,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:03,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:57:03,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:03,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-10 12:57:03,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 12:57:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 12:57:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 12:57:03,631 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 12:57:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:03,727 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 12:57:03,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 12:57:03,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 12:57:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:03,728 INFO L225 Difference]: With dead ends: 43 [2018-11-10 12:57:03,728 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 12:57:03,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-10 12:57:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 12:57:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 12:57:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 12:57:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 12:57:03,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 12:57:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:03,736 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 12:57:03,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 12:57:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 12:57:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 12:57:03,737 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:03,737 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:03,738 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:03,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 12:57:03,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:03,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:03,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:03,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:57:03,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:03,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:03,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:57:03,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:57:03,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:03,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:57:03,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:03,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 12:57:03,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 12:57:03,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 12:57:03,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:57:03,885 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 12:57:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:03,970 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 12:57:03,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 12:57:03,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 12:57:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:03,970 INFO L225 Difference]: With dead ends: 46 [2018-11-10 12:57:03,970 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 12:57:03,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 12:57:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 12:57:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 12:57:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 12:57:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 12:57:03,974 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 12:57:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:03,974 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 12:57:03,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 12:57:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 12:57:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 12:57:03,975 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:03,975 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:03,976 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:03,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 12:57:03,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:03,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:57:04,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:04,091 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:57:04,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 12:57:04,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:04,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:57:04,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:04,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 12:57:04,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 12:57:04,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 12:57:04,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-10 12:57:04,171 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 12:57:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:04,302 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 12:57:04,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 12:57:04,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 12:57:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:04,304 INFO L225 Difference]: With dead ends: 49 [2018-11-10 12:57:04,304 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 12:57:04,304 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 [2018-11-10 12:57:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 12:57:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 12:57:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 12:57:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 12:57:04,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 12:57:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:04,308 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 12:57:04,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 12:57:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 12:57:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 12:57:04,309 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:04,309 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:04,309 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:04,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 12:57:04,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:04,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:04,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:04,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 12:57:04,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:04,405 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:04,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:57:04,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:57:04,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:04,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 12:57:04,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:04,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 12:57:04,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 12:57:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 12:57:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:57:04,463 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 12:57:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:04,632 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 12:57:04,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 12:57:04,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 12:57:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:04,633 INFO L225 Difference]: With dead ends: 52 [2018-11-10 12:57:04,633 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 12:57:04,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-10 12:57:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 12:57:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 12:57:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 12:57:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 12:57:04,637 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 12:57:04,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:04,637 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 12:57:04,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 12:57:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 12:57:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 12:57:04,638 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:04,638 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:04,639 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:04,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:04,639 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-10 12:57:04,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:04,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:04,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:04,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 12:57:04,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:04,761 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:04,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:57:04,782 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 12:57:04,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:04,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 12:57:04,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:04,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 12:57:04,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 12:57:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 12:57:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-10 12:57:04,815 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 12:57:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:04,916 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 12:57:04,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 12:57:04,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 12:57:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:04,917 INFO L225 Difference]: With dead ends: 55 [2018-11-10 12:57:04,917 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 12:57:04,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-10 12:57:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 12:57:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 12:57:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 12:57:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 12:57:04,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 12:57:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:04,922 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 12:57:04,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 12:57:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 12:57:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 12:57:04,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:04,923 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:04,923 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:04,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-10 12:57:04,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:04,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 12:57:05,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:05,072 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:05,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:57:05,108 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 12:57:05,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:05,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 12:57:05,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:05,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 12:57:05,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 12:57:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 12:57:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-10 12:57:05,172 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 12:57:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:05,321 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 12:57:05,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 12:57:05,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 12:57:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:05,322 INFO L225 Difference]: With dead ends: 58 [2018-11-10 12:57:05,322 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 12:57:05,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-10 12:57:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 12:57:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 12:57:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 12:57:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 12:57:05,327 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 12:57:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:05,327 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 12:57:05,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 12:57:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 12:57:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 12:57:05,328 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:05,328 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:05,329 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:05,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-10 12:57:05,329 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:05,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:05,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:05,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:05,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 12:57:05,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:05,442 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:05,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:05,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 12:57:05,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:05,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 12:57:05,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 12:57:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 12:57:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-10 12:57:05,506 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 12:57:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:05,660 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 12:57:05,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 12:57:05,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 12:57:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:05,661 INFO L225 Difference]: With dead ends: 61 [2018-11-10 12:57:05,661 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 12:57:05,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-10 12:57:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 12:57:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 12:57:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 12:57:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 12:57:05,665 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 12:57:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:05,666 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 12:57:05,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 12:57:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 12:57:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 12:57:05,667 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:05,667 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:05,667 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:05,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-10 12:57:05,667 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:05,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 12:57:05,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:05,814 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:05,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:57:05,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:57:05,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:05,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 12:57:05,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:05,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 12:57:05,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 12:57:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 12:57:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-10 12:57:05,884 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 12:57:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:06,045 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 12:57:06,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 12:57:06,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 12:57:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:06,047 INFO L225 Difference]: With dead ends: 64 [2018-11-10 12:57:06,047 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 12:57:06,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 12:57:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 12:57:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 12:57:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 12:57:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 12:57:06,051 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 12:57:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:06,051 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 12:57:06,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 12:57:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 12:57:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 12:57:06,052 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:06,052 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:06,052 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:06,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-10 12:57:06,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:06,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:06,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:06,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 12:57:06,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:06,178 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:06,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:57:06,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 12:57:06,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:06,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 12:57:06,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:06,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 12:57:06,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 12:57:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 12:57:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-10 12:57:06,248 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-10 12:57:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:06,403 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-10 12:57:06,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 12:57:06,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-10 12:57:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:06,404 INFO L225 Difference]: With dead ends: 67 [2018-11-10 12:57:06,404 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 12:57:06,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 12:57:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 12:57:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-10 12:57:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 12:57:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-10 12:57:06,407 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-10 12:57:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:06,407 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-10 12:57:06,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 12:57:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-10 12:57:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 12:57:06,408 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:06,408 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:06,408 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:06,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-10 12:57:06,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:06,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:06,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 12:57:06,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:06,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:06,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:57:06,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:57:06,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:06,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 12:57:06,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:06,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-10 12:57:06,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 12:57:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 12:57:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-10 12:57:06,613 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-10 12:57:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:06,773 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-10 12:57:06,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 12:57:06,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-10 12:57:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:06,774 INFO L225 Difference]: With dead ends: 70 [2018-11-10 12:57:06,774 INFO L226 Difference]: Without dead ends: 66 [2018-11-10 12:57:06,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 12:57:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-10 12:57:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-10 12:57:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 12:57:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-10 12:57:06,778 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-10 12:57:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:06,778 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-10 12:57:06,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 12:57:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-10 12:57:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-10 12:57:06,779 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:06,779 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:06,779 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:06,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-10 12:57:06,779 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:06,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:06,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:06,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 12:57:06,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:06,975 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:06,983 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:57:07,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-10 12:57:07,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:07,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 12:57:07,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:07,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-10 12:57:07,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 12:57:07,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 12:57:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-10 12:57:07,065 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-10 12:57:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:07,248 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-10 12:57:07,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 12:57:07,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-10 12:57:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:07,248 INFO L225 Difference]: With dead ends: 73 [2018-11-10 12:57:07,249 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 12:57:07,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 12:57:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 12:57:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-10 12:57:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 12:57:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-10 12:57:07,253 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-10 12:57:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:07,253 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-10 12:57:07,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 12:57:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-10 12:57:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 12:57:07,253 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:07,254 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:07,254 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:07,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-10 12:57:07,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:07,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:07,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:07,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:07,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 12:57:07,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:07,417 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:07,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:57:07,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-10 12:57:07,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:07,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 12:57:07,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:07,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-10 12:57:07,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 12:57:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 12:57:07,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-10 12:57:07,511 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-10 12:57:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:07,736 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-10 12:57:07,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 12:57:07,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-10 12:57:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:07,737 INFO L225 Difference]: With dead ends: 76 [2018-11-10 12:57:07,737 INFO L226 Difference]: Without dead ends: 72 [2018-11-10 12:57:07,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 12:57:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-10 12:57:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-10 12:57:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-10 12:57:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-10 12:57:07,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-10 12:57:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:07,741 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-10 12:57:07,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 12:57:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-10 12:57:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-10 12:57:07,742 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:07,742 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:07,742 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:07,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-10 12:57:07,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:07,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:07,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 12:57:07,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:07,926 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:07,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:07,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 12:57:07,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:07,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-10 12:57:07,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 12:57:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 12:57:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-10 12:57:07,994 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-10 12:57:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:08,222 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-10 12:57:08,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 12:57:08,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-10 12:57:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:08,223 INFO L225 Difference]: With dead ends: 79 [2018-11-10 12:57:08,223 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 12:57:08,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 12:57:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 12:57:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-10 12:57:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 12:57:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-10 12:57:08,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-10 12:57:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:08,227 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-10 12:57:08,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 12:57:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-10 12:57:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-10 12:57:08,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:08,228 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:08,229 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:08,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-10 12:57:08,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:08,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:08,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:08,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:08,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-10 12:57:08,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:08,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:08,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:57:08,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:57:08,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:08,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-10 12:57:08,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:08,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-10 12:57:08,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 12:57:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 12:57:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-10 12:57:08,519 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-10 12:57:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:08,754 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-10 12:57:08,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 12:57:08,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-10 12:57:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:08,756 INFO L225 Difference]: With dead ends: 82 [2018-11-10 12:57:08,756 INFO L226 Difference]: Without dead ends: 78 [2018-11-10 12:57:08,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 12:57:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-10 12:57:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-10 12:57:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-10 12:57:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-10 12:57:08,760 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-10 12:57:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:08,760 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-10 12:57:08,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 12:57:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-10 12:57:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-10 12:57:08,762 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:08,762 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:08,763 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:08,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-11-10 12:57:08,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:08,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:08,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:08,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:08,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-10 12:57:08,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:08,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:08,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:57:09,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-10 12:57:09,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:09,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-10 12:57:09,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:09,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-10 12:57:09,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 12:57:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 12:57:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-10 12:57:09,052 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-10 12:57:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:09,310 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-10 12:57:09,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 12:57:09,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-10 12:57:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:09,311 INFO L225 Difference]: With dead ends: 85 [2018-11-10 12:57:09,311 INFO L226 Difference]: Without dead ends: 81 [2018-11-10 12:57:09,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-10 12:57:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-10 12:57:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-10 12:57:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-10 12:57:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-10 12:57:09,317 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-10 12:57:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:09,317 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-10 12:57:09,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 12:57:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-10 12:57:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-10 12:57:09,318 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:09,318 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:09,318 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:09,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2018-11-10 12:57:09,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:09,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:09,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:09,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:09,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-10 12:57:09,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:09,545 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:09,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:57:09,573 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:57:09,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:09,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-10 12:57:09,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:09,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-10 12:57:09,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 12:57:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 12:57:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-10 12:57:09,624 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-10 12:57:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:09,871 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-10 12:57:09,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-10 12:57:09,872 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-10 12:57:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:09,872 INFO L225 Difference]: With dead ends: 88 [2018-11-10 12:57:09,873 INFO L226 Difference]: Without dead ends: 84 [2018-11-10 12:57:09,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 12:57:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-10 12:57:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-10 12:57:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-10 12:57:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-10 12:57:09,877 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-10 12:57:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:09,877 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-10 12:57:09,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 12:57:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-10 12:57:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-10 12:57:09,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:09,878 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:09,878 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:09,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2018-11-10 12:57:09,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:09,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:09,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:09,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:09,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-10 12:57:10,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:10,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:10,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:57:10,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-10 12:57:10,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:10,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-10 12:57:10,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:10,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-10 12:57:10,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 12:57:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 12:57:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-10 12:57:10,194 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-10 12:57:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:10,484 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-10 12:57:10,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 12:57:10,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-10 12:57:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:10,485 INFO L225 Difference]: With dead ends: 91 [2018-11-10 12:57:10,485 INFO L226 Difference]: Without dead ends: 87 [2018-11-10 12:57:10,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 12:57:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-10 12:57:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-10 12:57:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-10 12:57:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-10 12:57:10,489 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-10 12:57:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:10,489 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-10 12:57:10,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 12:57:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-10 12:57:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-10 12:57:10,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:10,489 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:10,490 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:10,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2018-11-10 12:57:10,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:10,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:10,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:10,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:10,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-10 12:57:10,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:10,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:10,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:57:10,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-10 12:57:10,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:57:10,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-10 12:57:10,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:10,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-10 12:57:10,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 12:57:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 12:57:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-10 12:57:10,874 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-10 12:57:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:11,126 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-10 12:57:11,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 12:57:11,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-10 12:57:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:11,127 INFO L225 Difference]: With dead ends: 94 [2018-11-10 12:57:11,127 INFO L226 Difference]: Without dead ends: 90 [2018-11-10 12:57:11,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 12:57:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-10 12:57:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-10 12:57:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-10 12:57:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-10 12:57:11,131 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-10 12:57:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:11,131 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-10 12:57:11,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 12:57:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-10 12:57:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-10 12:57:11,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:11,133 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:11,133 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:11,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2018-11-10 12:57:11,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:11,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:11,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:11,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:57:11,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-11-10 12:57:12,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:57:12,092 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:57:12,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:12,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:57:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-11-10 12:57:12,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:57:12,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-10 12:57:12,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-10 12:57:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-10 12:57:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-10 12:57:12,220 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2018-11-10 12:57:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:12,840 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-11-10 12:57:12,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-10 12:57:12,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2018-11-10 12:57:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:12,841 INFO L225 Difference]: With dead ends: 97 [2018-11-10 12:57:12,842 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 12:57:12,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-10 12:57:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 12:57:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-10 12:57:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 12:57:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-11-10 12:57:12,846 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2018-11-10 12:57:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:12,846 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-11-10 12:57:12,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-10 12:57:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-11-10 12:57:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-10 12:57:12,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:57:12,847 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:57:12,847 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:57:12,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:57:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2018-11-10 12:57:12,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:57:12,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:57:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:12,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:57:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:57:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:57:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-11-10 12:57:13,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:57:13,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2018-11-10 12:57:13,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-10 12:57:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-10 12:57:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-11-10 12:57:13,161 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2018-11-10 12:57:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:57:13,400 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-11-10 12:57:13,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 12:57:13,401 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2018-11-10 12:57:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:57:13,401 INFO L225 Difference]: With dead ends: 93 [2018-11-10 12:57:13,401 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 12:57:13,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2018-11-10 12:57:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 12:57:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 12:57:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 12:57:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 12:57:13,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2018-11-10 12:57:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:57:13,402 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:57:13,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-10 12:57:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 12:57:13,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 12:57:13,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 12:57:13,425 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 12:57:13,425 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-10 12:57:13,425 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 25) (<= 25 main_~input~0)) [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-10 12:57:13,426 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-10 12:57:13,426 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-10 12:57:13,426 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-10 12:57:13,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:57:13 BoogieIcfgContainer [2018-11-10 12:57:13,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 12:57:13,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:57:13,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:57:13,429 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:57:13,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:57:01" (3/4) ... [2018-11-10 12:57:13,432 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 12:57:13,437 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 12:57:13,437 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 12:57:13,437 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-10 12:57:13,440 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 12:57:13,440 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 12:57:13,440 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 12:57:13,465 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_addb7c69-48fc-4990-a1ec-cdacace52c6f/bin-2019/uautomizer/witness.graphml [2018-11-10 12:57:13,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:57:13,466 INFO L168 Benchmark]: Toolchain (without parser) took 11854.67 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.0 MB). Free memory was 963.0 MB in the beginning and 1.0 GB in the end (delta: -82.0 MB). Peak memory consumption was 232.0 MB. Max. memory is 11.5 GB. [2018-11-10 12:57:13,467 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:57:13,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.33 ms. Allocated memory is still 1.0 GB. Free memory was 963.0 MB in the beginning and 951.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 12:57:13,467 INFO L168 Benchmark]: Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:57:13,467 INFO L168 Benchmark]: RCFGBuilder took 169.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.2 MB in the beginning and 1.1 GB in the end (delta: -178.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-11-10 12:57:13,468 INFO L168 Benchmark]: TraceAbstraction took 11479.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 75.4 MB). Peak memory consumption was 247.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:57:13,468 INFO L168 Benchmark]: Witness Printer took 37.10 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 11.5 GB. [2018-11-10 12:57:13,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.33 ms. Allocated memory is still 1.0 GB. Free memory was 963.0 MB in the beginning and 951.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 169.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.2 MB in the beginning and 1.1 GB in the end (delta: -178.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11479.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 75.4 MB). Peak memory consumption was 247.9 MB. Max. memory is 11.5 GB. * Witness Printer took 37.10 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 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, 11.4s OverallTime, 27 OverallIterations, 27 TraceHistogramMax, 4.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 5842 SDs, 0 SdLazy, 3921 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3439 GetRequests, 2628 SyntacticMatches, 2 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, 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, 27 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, 0.6s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 4732 NumberOfCodeBlocks, 4732 NumberOfCodeBlocksAsserted, 224 NumberOfCheckSat, 4680 ConstructedInterpolants, 0 QuantifiedInterpolants, 1419072 SizeOfPredicates, 349 NumberOfNonLiveVariables, 5325 ConjunctsInSsa, 803 ConjunctsInUnsatCore, 52 InterpolantComputations, 2 PerfectInterpolantSequences, 18954/35854 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...