./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 a544811fe2a74801350302afc46fb67e1c6f238a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:10:19,430 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:10:19,431 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:10:19,438 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:10:19,439 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:10:19,439 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:10:19,440 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:10:19,441 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:10:19,442 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:10:19,443 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:10:19,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:10:19,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:10:19,444 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:10:19,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:10:19,446 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:10:19,447 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:10:19,447 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:10:19,448 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:10:19,450 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:10:19,451 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:10:19,452 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:10:19,453 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:10:19,455 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:10:19,455 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:10:19,455 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:10:19,456 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:10:19,457 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:10:19,457 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:10:19,458 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:10:19,459 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:10:19,459 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:10:19,459 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:10:19,460 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:10:19,460 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:10:19,461 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:10:19,461 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:10:19,461 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 13:10:19,472 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:10:19,472 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:10:19,472 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:10:19,473 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 13:10:19,473 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:10:19,473 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:10:19,473 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:10:19,473 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:10:19,474 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:10:19,475 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:10:19,475 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:10:19,476 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:10:19,476 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:10:19,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:10:19,477 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_5c88ff70-2c3c-402f-9799-3896409d02cc/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 -> a544811fe2a74801350302afc46fb67e1c6f238a [2018-11-18 13:10:19,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:10:19,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:10:19,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:10:19,510 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:10:19,510 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:10:19,511 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-11-18 13:10:19,553 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/data/3e4760f77/d9f9d9b5eb6d4b6381516ef6a529d401/FLAGdef9d51ce [2018-11-18 13:10:19,951 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:10:19,951 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-11-18 13:10:19,955 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/data/3e4760f77/d9f9d9b5eb6d4b6381516ef6a529d401/FLAGdef9d51ce [2018-11-18 13:10:19,964 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/data/3e4760f77/d9f9d9b5eb6d4b6381516ef6a529d401 [2018-11-18 13:10:19,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:10:19,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:10:19,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:10:19,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:10:19,970 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:10:19,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:10:19" (1/1) ... [2018-11-18 13:10:19,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a96ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:19, skipping insertion in model container [2018-11-18 13:10:19,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:10:19" (1/1) ... [2018-11-18 13:10:19,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:10:19,989 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:10:20,091 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:10:20,093 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:10:20,102 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:10:20,110 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:10:20,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20 WrapperNode [2018-11-18 13:10:20,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:10:20,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:10:20,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:10:20,111 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:10:20,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... [2018-11-18 13:10:20,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:10:20,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:10:20,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:10:20,126 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:10:20,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:10:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:10:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 13:10:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:10:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:10:20,271 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:10:20,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:10:20 BoogieIcfgContainer [2018-11-18 13:10:20,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:10:20,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:10:20,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:10:20,274 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:10:20,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:10:19" (1/3) ... [2018-11-18 13:10:20,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d21526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:10:20, skipping insertion in model container [2018-11-18 13:10:20,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:10:20" (2/3) ... [2018-11-18 13:10:20,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d21526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:10:20, skipping insertion in model container [2018-11-18 13:10:20,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:10:20" (3/3) ... [2018-11-18 13:10:20,277 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_false-unreach-call_true-termination.c [2018-11-18 13:10:20,282 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:10:20,286 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:10:20,295 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:10:20,312 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:10:20,312 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:10:20,312 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:10:20,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:10:20,312 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:10:20,312 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:10:20,312 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:10:20,312 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:10:20,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:10:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 13:10:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:10:20,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:20,327 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:20,329 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:20,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 13:10:20,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:20,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:20,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:20,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:10:20,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:10:20,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:10:20,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:10:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:10:20,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:10:20,466 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 13:10:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:20,523 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 13:10:20,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:10:20,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 13:10:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:20,530 INFO L225 Difference]: With dead ends: 30 [2018-11-18 13:10:20,530 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 13:10:20,532 INFO L604 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 [2018-11-18 13:10:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 13:10:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 13:10:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 13:10:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 13:10:20,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 13:10:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:20,557 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 13:10:20,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:10:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 13:10:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:10:20,559 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:20,559 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:20,559 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:20,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 13:10:20,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:20,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:20,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:20,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:10:20,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:20,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:20,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:20,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:10:20,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:20,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 13:10:20,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:10:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:10:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:10:20,685 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 13:10:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:20,749 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 13:10:20,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:10:20,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 13:10:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:20,750 INFO L225 Difference]: With dead ends: 25 [2018-11-18 13:10:20,750 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 13:10:20,750 INFO L604 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 [2018-11-18 13:10:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 13:10:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 13:10:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 13:10:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 13:10:20,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 13:10:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:20,755 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 13:10:20,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:10:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 13:10:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 13:10:20,755 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:20,756 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:20,756 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:20,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 13:10:20,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:20,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:20,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:20,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:10:20,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:20,828 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:20,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:10:20,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:10:20,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:20,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:10:20,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:20,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 13:10:20,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:10:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:10:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:10:20,906 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 13:10:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:20,953 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 13:10:20,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:10:20,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 13:10:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:20,955 INFO L225 Difference]: With dead ends: 28 [2018-11-18 13:10:20,955 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 13:10:20,955 INFO L604 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 [2018-11-18 13:10:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 13:10:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 13:10:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:10:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 13:10:20,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 13:10:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:20,960 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 13:10:20,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:10:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 13:10:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 13:10:20,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:20,961 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:20,961 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:20,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 13:10:20,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:20,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:20,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:20,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 13:10:21,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:21,079 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:21,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:10:21,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 13:10:21,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:21,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 13:10:21,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:21,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 13:10:21,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 13:10:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 13:10:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:10:21,129 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-18 13:10:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:21,144 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 13:10:21,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 13:10:21,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-18 13:10:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:21,145 INFO L225 Difference]: With dead ends: 31 [2018-11-18 13:10:21,145 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 13:10:21,146 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:10:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 13:10:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 13:10:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 13:10:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 13:10:21,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 13:10:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:21,149 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 13:10:21,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 13:10:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 13:10:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 13:10:21,150 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:21,150 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:21,150 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:21,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 13:10:21,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:21,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:21,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:21,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 13:10:21,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:21,225 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:21,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:10:21,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:10:21,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:21,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 13:10:21,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:21,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 13:10:21,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:10:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:10:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:10:21,285 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 13:10:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:21,359 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 13:10:21,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:10:21,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 13:10:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:21,361 INFO L225 Difference]: With dead ends: 34 [2018-11-18 13:10:21,361 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 13:10:21,361 INFO L604 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 [2018-11-18 13:10:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 13:10:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 13:10:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:10:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 13:10:21,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 13:10:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:21,365 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 13:10:21,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:10:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 13:10:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 13:10:21,366 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:21,366 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:21,366 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:21,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 13:10:21,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:21,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:21,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:21,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 13:10:21,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:21,476 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:21,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:10:21,498 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 13:10:21,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:21,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 13:10:21,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:21,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 13:10:21,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 13:10:21,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 13:10:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:10:21,528 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-18 13:10:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:21,559 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 13:10:21,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 13:10:21,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-18 13:10:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:21,560 INFO L225 Difference]: With dead ends: 37 [2018-11-18 13:10:21,560 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 13:10:21,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:10:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 13:10:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 13:10:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 13:10:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 13:10:21,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 13:10:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:21,564 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 13:10:21,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 13:10:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 13:10:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 13:10:21,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:21,566 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:21,566 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:21,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 13:10:21,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:21,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:21,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:21,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 13:10:21,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:21,701 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:21,707 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:10:21,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 13:10:21,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:21,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 13:10:21,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:21,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-11-18 13:10:21,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 13:10:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 13:10:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-11-18 13:10:21,854 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-11-18 13:10:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:22,066 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 13:10:22,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 13:10:22,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-11-18 13:10:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:22,067 INFO L225 Difference]: With dead ends: 40 [2018-11-18 13:10:22,067 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 13:10:22,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 13:10:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 13:10:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 13:10:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 13:10:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 13:10:22,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 13:10:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:22,071 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 13:10:22,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 13:10:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 13:10:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 13:10:22,072 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:22,072 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:22,073 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:22,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-18 13:10:22,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:22,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:22,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:22,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 13:10:22,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:22,202 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:22,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:22,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 13:10:22,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:22,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-11-18 13:10:22,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 13:10:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 13:10:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-11-18 13:10:22,348 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-11-18 13:10:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:22,607 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 13:10:22,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 13:10:22,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-11-18 13:10:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:22,608 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:10:22,608 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:10:22,608 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 13:10:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:10:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 13:10:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 13:10:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 13:10:22,612 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 13:10:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:22,612 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 13:10:22,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 13:10:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 13:10:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 13:10:22,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:22,613 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:22,613 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:22,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-18 13:10:22,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:22,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:22,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:22,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 13:10:22,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:22,696 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:22,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:10:22,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:10:22,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:22,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 13:10:22,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:22,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 13:10:22,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:10:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:10:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:10:22,746 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 13:10:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:22,811 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 13:10:22,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:10:22,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 13:10:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:22,812 INFO L225 Difference]: With dead ends: 46 [2018-11-18 13:10:22,812 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 13:10:22,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:10:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 13:10:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 13:10:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 13:10:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 13:10:22,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 13:10:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:22,818 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 13:10:22,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:10:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 13:10:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 13:10:22,820 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:22,820 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:22,820 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:22,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-18 13:10:22,820 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:22,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:22,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:22,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 13:10:22,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:22,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:22,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:10:22,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 13:10:22,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:22,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 13:10:23,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:23,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-11-18 13:10:23,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-18 13:10:23,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-18 13:10:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-18 13:10:23,189 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-11-18 13:10:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:23,481 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 13:10:23,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 13:10:23,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-11-18 13:10:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:23,482 INFO L225 Difference]: With dead ends: 49 [2018-11-18 13:10:23,482 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 13:10:23,483 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-11-18 13:10:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 13:10:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 13:10:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 13:10:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 13:10:23,486 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 13:10:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:23,487 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 13:10:23,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-18 13:10:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 13:10:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 13:10:23,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:23,488 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:23,488 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:23,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:23,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-18 13:10:23,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:23,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:23,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:23,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:23,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 13:10:23,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:23,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:23,593 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:10:23,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:10:23,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:23,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 13:10:23,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:23,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 13:10:23,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 13:10:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 13:10:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:10:23,639 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-18 13:10:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:23,734 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 13:10:23,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 13:10:23,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-18 13:10:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:23,735 INFO L225 Difference]: With dead ends: 52 [2018-11-18 13:10:23,735 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 13:10:23,735 INFO L604 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 [2018-11-18 13:10:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 13:10:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 13:10:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 13:10:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 13:10:23,739 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 13:10:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 13:10:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 13:10:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 13:10:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 13:10:23,740 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:23,740 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:23,741 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:23,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-18 13:10:23,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:23,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:23,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:23,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:23,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 13:10:23,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:23,849 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:23,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:10:23,870 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 13:10:23,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:23,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 13:10:23,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:23,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-18 13:10:23,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 13:10:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 13:10:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:10:23,914 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 13:10:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:24,052 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 13:10:24,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 13:10:24,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 13:10:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:24,054 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:10:24,054 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 13:10:24,054 INFO L604 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 [2018-11-18 13:10:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 13:10:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 13:10:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 13:10:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 13:10:24,058 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 13:10:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:24,058 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 13:10:24,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 13:10:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 13:10:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 13:10:24,059 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:24,059 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:24,059 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:24,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-18 13:10:24,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:24,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:24,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:24,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:24,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 13:10:24,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:24,239 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:10:24,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 13:10:24,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:24,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 13:10:24,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:24,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-18 13:10:24,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 13:10:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 13:10:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-18 13:10:24,297 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-11-18 13:10:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:24,335 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 13:10:24,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 13:10:24,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-11-18 13:10:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:24,336 INFO L225 Difference]: With dead ends: 58 [2018-11-18 13:10:24,336 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 13:10:24,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-18 13:10:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 13:10:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 13:10:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 13:10:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 13:10:24,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 13:10:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:24,342 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 13:10:24,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 13:10:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 13:10:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 13:10:24,343 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:24,343 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:24,343 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:24,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-18 13:10:24,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:24,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:24,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:24,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:24,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 13:10:24,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:24,588 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:24,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:24,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 13:10:24,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:24,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-11-18 13:10:24,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-18 13:10:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-18 13:10:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-11-18 13:10:24,889 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-11-18 13:10:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:25,323 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 13:10:25,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-18 13:10:25,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-11-18 13:10:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:25,324 INFO L225 Difference]: With dead ends: 61 [2018-11-18 13:10:25,324 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 13:10:25,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-11-18 13:10:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 13:10:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 13:10:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 13:10:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 13:10:25,332 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 13:10:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:25,332 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 13:10:25,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-18 13:10:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 13:10:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 13:10:25,333 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:25,333 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:25,334 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:25,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-18 13:10:25,334 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:25,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:25,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:25,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:25,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 13:10:25,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:25,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:25,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:10:25,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:10:25,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:25,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 13:10:25,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:25,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-11-18 13:10:25,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-18 13:10:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-18 13:10:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-11-18 13:10:25,876 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-11-18 13:10:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:26,339 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 13:10:26,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-18 13:10:26,339 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-11-18 13:10:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:26,340 INFO L225 Difference]: With dead ends: 64 [2018-11-18 13:10:26,340 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 13:10:26,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-11-18 13:10:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 13:10:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 13:10:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 13:10:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 13:10:26,345 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 13:10:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:26,345 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 13:10:26,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-18 13:10:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 13:10:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 13:10:26,346 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:26,346 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:26,348 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:26,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-18 13:10:26,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:26,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:26,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:26,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:26,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 13:10:26,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:26,604 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:26,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:10:26,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 13:10:26,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:26,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 13:10:26,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:26,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-11-18 13:10:26,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-18 13:10:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-18 13:10:26,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-11-18 13:10:26,929 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-11-18 13:10:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:27,427 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 13:10:27,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-18 13:10:27,427 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-11-18 13:10:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:27,428 INFO L225 Difference]: With dead ends: 67 [2018-11-18 13:10:27,428 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 13:10:27,429 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-11-18 13:10:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 13:10:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 13:10:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 13:10:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 13:10:27,432 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 13:10:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:27,433 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 13:10:27,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-18 13:10:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 13:10:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 13:10:27,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:27,434 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:27,434 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:27,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-18 13:10:27,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:27,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:27,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:27,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 13:10:27,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:27,705 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:27,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:10:27,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:10:27,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:27,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 13:10:28,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:28,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-11-18 13:10:28,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-18 13:10:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-18 13:10:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-11-18 13:10:28,057 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-11-18 13:10:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:28,641 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-18 13:10:28,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 13:10:28,642 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-11-18 13:10:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:28,642 INFO L225 Difference]: With dead ends: 70 [2018-11-18 13:10:28,643 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 13:10:28,646 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-11-18 13:10:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 13:10:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 13:10:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 13:10:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 13:10:28,649 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-18 13:10:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:28,649 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 13:10:28,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-18 13:10:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 13:10:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-18 13:10:28,650 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:28,650 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:28,650 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:28,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-18 13:10:28,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:28,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:28,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 13:10:28,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:28,849 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:28,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:10:28,903 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 13:10:28,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:28,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 13:10:29,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:29,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-11-18 13:10:29,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-18 13:10:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-18 13:10:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-11-18 13:10:29,473 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-11-18 13:10:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:30,084 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-18 13:10:30,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-18 13:10:30,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-11-18 13:10:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:30,085 INFO L225 Difference]: With dead ends: 73 [2018-11-18 13:10:30,085 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 13:10:30,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-11-18 13:10:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 13:10:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 13:10:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 13:10:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 13:10:30,090 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-18 13:10:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:30,091 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 13:10:30,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-18 13:10:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 13:10:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 13:10:30,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:30,091 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:30,092 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:30,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-18 13:10:30,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:30,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:30,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:30,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:30,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 13:10:30,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:30,263 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:30,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:10:30,295 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 13:10:30,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:30,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 13:10:30,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:30,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-11-18 13:10:30,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-18 13:10:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-18 13:10:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 13:10:30,832 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-11-18 13:10:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:31,494 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-18 13:10:31,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-18 13:10:31,494 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-11-18 13:10:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:31,495 INFO L225 Difference]: With dead ends: 76 [2018-11-18 13:10:31,495 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 13:10:31,496 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-11-18 13:10:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 13:10:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 13:10:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 13:10:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 13:10:31,498 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-18 13:10:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:31,499 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 13:10:31,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-18 13:10:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 13:10:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-18 13:10:31,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:31,500 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:31,500 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:31,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-18 13:10:31,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:31,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:31,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 13:10:31,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:31,701 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:31,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:31,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 13:10:31,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:31,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-18 13:10:31,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 13:10:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 13:10:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-18 13:10:31,762 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-18 13:10:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:31,972 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-18 13:10:31,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 13:10:31,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-18 13:10:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:31,973 INFO L225 Difference]: With dead ends: 79 [2018-11-18 13:10:31,973 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 13:10:31,974 INFO L604 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 [2018-11-18 13:10:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 13:10:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 13:10:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 13:10:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 13:10:31,977 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-18 13:10:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:31,977 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 13:10:31,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 13:10:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 13:10:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-18 13:10:31,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:31,978 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:31,978 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:31,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-18 13:10:31,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:31,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:31,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:31,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:10:31,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 13:10:32,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:32,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:32,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:10:32,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:10:32,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:32,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 13:10:32,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:32,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-18 13:10:32,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 13:10:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 13:10:32,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-18 13:10:32,221 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-18 13:10:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:32,436 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-18 13:10:32,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 13:10:32,436 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-18 13:10:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:32,437 INFO L225 Difference]: With dead ends: 82 [2018-11-18 13:10:32,437 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 13:10:32,437 INFO L604 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 [2018-11-18 13:10:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 13:10:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-18 13:10:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 13:10:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-18 13:10:32,441 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-18 13:10:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:32,441 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-18 13:10:32,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 13:10:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-18 13:10:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-18 13:10:32,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:32,442 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:32,442 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:32,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-11-18 13:10:32,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:32,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:32,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:32,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:32,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 13:10:32,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:32,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:32,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:10:32,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-18 13:10:32,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:32,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 13:10:32,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:32,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-18 13:10:32,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 13:10:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 13:10:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-18 13:10:32,706 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-18 13:10:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:32,945 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-18 13:10:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 13:10:32,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-18 13:10:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:32,947 INFO L225 Difference]: With dead ends: 85 [2018-11-18 13:10:32,948 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 13:10:32,948 INFO L604 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 [2018-11-18 13:10:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 13:10:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-18 13:10:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 13:10:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-18 13:10:32,952 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-18 13:10:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:32,952 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-18 13:10:32,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 13:10:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-18 13:10:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-18 13:10:32,953 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:32,953 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:32,953 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:32,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2018-11-18 13:10:32,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:32,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:32,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-18 13:10:33,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:33,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:33,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:10:33,213 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:10:33,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:33,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-18 13:10:33,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:33,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-18 13:10:33,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-18 13:10:33,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-18 13:10:33,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-18 13:10:33,263 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-18 13:10:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:33,512 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-18 13:10:33,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 13:10:33,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-18 13:10:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:33,513 INFO L225 Difference]: With dead ends: 88 [2018-11-18 13:10:33,513 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 13:10:33,514 INFO L604 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 [2018-11-18 13:10:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 13:10:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-18 13:10:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-18 13:10:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-18 13:10:33,517 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-18 13:10:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:33,517 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-18 13:10:33,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-18 13:10:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-18 13:10:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-18 13:10:33,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:33,518 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:33,518 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:33,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2018-11-18 13:10:33,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:33,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:33,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:33,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:33,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-18 13:10:33,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:33,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:33,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:10:33,779 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-18 13:10:33,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:33,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-18 13:10:33,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:33,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-18 13:10:33,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 13:10:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 13:10:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-18 13:10:33,849 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-18 13:10:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:34,124 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-18 13:10:34,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 13:10:34,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-18 13:10:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:34,125 INFO L225 Difference]: With dead ends: 91 [2018-11-18 13:10:34,125 INFO L226 Difference]: Without dead ends: 87 [2018-11-18 13:10:34,125 INFO L604 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 [2018-11-18 13:10:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-18 13:10:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-18 13:10:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 13:10:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-18 13:10:34,129 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-18 13:10:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-18 13:10:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 13:10:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-18 13:10:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-18 13:10:34,131 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:34,131 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:34,131 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:34,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2018-11-18 13:10:34,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:34,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:34,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:10:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-18 13:10:34,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:10:34,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/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 [2018-11-18 13:10:34,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:10:34,433 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-18 13:10:34,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:10:34,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:10:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-18 13:10:34,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:10:34,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-18 13:10:34,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 13:10:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 13:10:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-18 13:10:34,499 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-18 13:10:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:10:34,802 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-18 13:10:34,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 13:10:34,802 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-18 13:10:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:10:34,803 INFO L225 Difference]: With dead ends: 94 [2018-11-18 13:10:34,803 INFO L226 Difference]: Without dead ends: 90 [2018-11-18 13:10:34,803 INFO L604 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 [2018-11-18 13:10:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-18 13:10:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-18 13:10:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-18 13:10:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-18 13:10:34,805 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-18 13:10:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:10:34,806 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-18 13:10:34,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 13:10:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-18 13:10:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-18 13:10:34,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:10:34,806 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:10:34,806 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:10:34,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:10:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2018-11-18 13:10:34,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:10:34,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:10:34,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:34,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:10:34,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:10:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:10:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:10:34,832 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:10:34,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:10:34 BoogieIcfgContainer [2018-11-18 13:10:34,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:10:34,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:10:34,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:10:34,861 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:10:34,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:10:20" (3/4) ... [2018-11-18 13:10:34,866 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:10:34,909 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5c88ff70-2c3c-402f-9799-3896409d02cc/bin-2019/uautomizer/witness.graphml [2018-11-18 13:10:34,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:10:34,910 INFO L168 Benchmark]: Toolchain (without parser) took 14942.93 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 460.3 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -99.3 MB). Peak memory consumption was 361.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:10:34,911 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:10:34,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:10:34,912 INFO L168 Benchmark]: Boogie Preprocessor took 14.64 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:10:34,912 INFO L168 Benchmark]: RCFGBuilder took 146.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:10:34,912 INFO L168 Benchmark]: TraceAbstraction took 14588.32 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 317.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 70.4 MB). Peak memory consumption was 388.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:10:34,913 INFO L168 Benchmark]: Witness Printer took 47.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:10:34,914 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.64 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14588.32 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 317.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 70.4 MB). Peak memory consumption was 388.2 MB. Max. memory is 11.5 GB. * Witness Printer took 47.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 14.5s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 6.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 326 SDtfs, 602 SDslu, 5076 SDs, 0 SdLazy, 2907 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3230 GetRequests, 2161 SyntacticMatches, 0 SemanticMatches, 1069 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10899 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 4400 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1084776 SizeOfPredicates, 278 NumberOfNonLiveVariables, 4968 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...