./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/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 dd317ac0ecdb37853dacea373914a521115465e0 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 08:36:45,735 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 08:36:45,736 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 08:36:45,745 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 08:36:45,745 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 08:36:45,746 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 08:36:45,747 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 08:36:45,748 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 08:36:45,749 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 08:36:45,750 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 08:36:45,751 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 08:36:45,751 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 08:36:45,751 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 08:36:45,752 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 08:36:45,753 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 08:36:45,754 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 08:36:45,754 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 08:36:45,755 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 08:36:45,757 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 08:36:45,758 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 08:36:45,759 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 08:36:45,759 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 08:36:45,761 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 08:36:45,761 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 08:36:45,761 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 08:36:45,762 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 08:36:45,763 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 08:36:45,763 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 08:36:45,764 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 08:36:45,765 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 08:36:45,765 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 08:36:45,765 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 08:36:45,766 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 08:36:45,766 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 08:36:45,766 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 08:36:45,767 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 08:36:45,767 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 08:36:45,777 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 08:36:45,777 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 08:36:45,778 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 08:36:45,778 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 08:36:45,779 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 08:36:45,779 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 08:36:45,779 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 08:36:45,779 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 08:36:45,779 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 08:36:45,779 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 08:36:45,780 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 08:36:45,781 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 08:36:45,781 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 08:36:45,781 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 08:36:45,781 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 08:36:45,781 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 08:36:45,781 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 08:36:45,782 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 08:36:45,782 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 08:36:45,782 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 08:36:45,782 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 08:36:45,782 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 08:36:45,782 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 08:36:45,782 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_d75c6c89-28f6-4cf1-b566-594e9ab18e95/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-11-10 08:36:45,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 08:36:45,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 08:36:45,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 08:36:45,820 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 08:36:45,820 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 08:36:45,821 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-10 08:36:45,861 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/data/cc76c9a2b/5661ae59ed4244528a0df30ead37cb62/FLAG953feb17e [2018-11-10 08:36:46,200 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 08:36:46,200 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-10 08:36:46,205 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/data/cc76c9a2b/5661ae59ed4244528a0df30ead37cb62/FLAG953feb17e [2018-11-10 08:36:46,215 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/data/cc76c9a2b/5661ae59ed4244528a0df30ead37cb62 [2018-11-10 08:36:46,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 08:36:46,217 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 08:36:46,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 08:36:46,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 08:36:46,220 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 08:36:46,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45cf7bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46, skipping insertion in model container [2018-11-10 08:36:46,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 08:36:46,240 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 08:36:46,328 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 08:36:46,331 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 08:36:46,339 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 08:36:46,347 INFO L193 MainTranslator]: Completed translation [2018-11-10 08:36:46,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46 WrapperNode [2018-11-10 08:36:46,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 08:36:46,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 08:36:46,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 08:36:46,348 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 08:36:46,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... [2018-11-10 08:36:46,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 08:36:46,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 08:36:46,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 08:36:46,364 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 08:36:46,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 08:36:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 08:36:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 08:36:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-10 08:36:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 08:36:46,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 08:36:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 08:36:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-10 08:36:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 08:36:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 08:36:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 08:36:46,555 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 08:36:46,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:36:46 BoogieIcfgContainer [2018-11-10 08:36:46,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 08:36:46,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 08:36:46,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 08:36:46,558 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 08:36:46,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 08:36:46" (1/3) ... [2018-11-10 08:36:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d9d298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 08:36:46, skipping insertion in model container [2018-11-10 08:36:46,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:36:46" (2/3) ... [2018-11-10 08:36:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d9d298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 08:36:46, skipping insertion in model container [2018-11-10 08:36:46,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:36:46" (3/3) ... [2018-11-10 08:36:46,560 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-11-10 08:36:46,566 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 08:36:46,571 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 08:36:46,580 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 08:36:46,603 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 08:36:46,604 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 08:36:46,604 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 08:36:46,604 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 08:36:46,604 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 08:36:46,604 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 08:36:46,604 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 08:36:46,605 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 08:36:46,605 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 08:36:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-10 08:36:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 08:36:46,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:46,623 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:46,625 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:46,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-10 08:36:46,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:46,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:46,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:46,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:46,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 08:36:46,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 08:36:46,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 08:36:46,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 08:36:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 08:36:46,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 08:36:46,777 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-10 08:36:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:46,864 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-10 08:36:46,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 08:36:46,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 08:36:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:46,874 INFO L225 Difference]: With dead ends: 35 [2018-11-10 08:36:46,874 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 08:36:46,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 08:36:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 08:36:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 08:36:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 08:36:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 08:36:46,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-10 08:36:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:46,911 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 08:36:46,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 08:36:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 08:36:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 08:36:46,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:46,913 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:46,913 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:46,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-10 08:36:46,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:46,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:46,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:46,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:46,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 08:36:46,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 08:36:46,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 08:36:46,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 08:36:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 08:36:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 08:36:46,951 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-10 08:36:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:47,019 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-10 08:36:47,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 08:36:47,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 08:36:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:47,021 INFO L225 Difference]: With dead ends: 27 [2018-11-10 08:36:47,021 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 08:36:47,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 08:36:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 08:36:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-10 08:36:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 08:36:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 08:36:47,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-10 08:36:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:47,034 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 08:36:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 08:36:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 08:36:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 08:36:47,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:47,035 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:47,035 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:47,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-10 08:36:47,036 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:47,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:47,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:47,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 08:36:47,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:47,109 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:47,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 08:36:47,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:47,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-10 08:36:47,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 08:36:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 08:36:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:36:47,203 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-10 08:36:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:47,278 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-10 08:36:47,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 08:36:47,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-10 08:36:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:47,280 INFO L225 Difference]: With dead ends: 38 [2018-11-10 08:36:47,280 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 08:36:47,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:36:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 08:36:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-10 08:36:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 08:36:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-10 08:36:47,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-10 08:36:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:47,286 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-10 08:36:47,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 08:36:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-10 08:36:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 08:36:47,287 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:47,287 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:47,287 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:47,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-10 08:36:47,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:47,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 08:36:47,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:47,339 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:47,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 08:36:47,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:47,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 08:36:47,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 08:36:47,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 08:36:47,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 08:36:47,394 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-10 08:36:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:47,444 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-10 08:36:47,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 08:36:47,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-10 08:36:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:47,446 INFO L225 Difference]: With dead ends: 32 [2018-11-10 08:36:47,446 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 08:36:47,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:36:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 08:36:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 08:36:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 08:36:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-10 08:36:47,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-10 08:36:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:47,451 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-10 08:36:47,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 08:36:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-10 08:36:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 08:36:47,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:47,452 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:47,452 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:47,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-10 08:36:47,453 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:47,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 08:36:47,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:47,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:47,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 08:36:47,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 08:36:47,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:47,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 08:36:47,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:47,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-10 08:36:47,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 08:36:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 08:36:47,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:36:47,558 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-10 08:36:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:47,645 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-10 08:36:47,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 08:36:47,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-10 08:36:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:47,647 INFO L225 Difference]: With dead ends: 40 [2018-11-10 08:36:47,647 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 08:36:47,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:36:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 08:36:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-10 08:36:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 08:36:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-10 08:36:47,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-10 08:36:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:47,656 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-10 08:36:47,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 08:36:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-10 08:36:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-10 08:36:47,659 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:47,659 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:47,659 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:47,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-10 08:36:47,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:47,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-10 08:36:47,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:47,834 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:47,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 08:36:47,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 08:36:47,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:47,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-10 08:36:47,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:47,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-10 08:36:47,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 08:36:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 08:36:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:36:47,909 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-10 08:36:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:48,107 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-10 08:36:48,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 08:36:48,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-10 08:36:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:48,112 INFO L225 Difference]: With dead ends: 76 [2018-11-10 08:36:48,112 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 08:36:48,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-10 08:36:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 08:36:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-10 08:36:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-10 08:36:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-10 08:36:48,121 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-10 08:36:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-10 08:36:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 08:36:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-10 08:36:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 08:36:48,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:48,124 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:48,124 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:48,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-10 08:36:48,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:48,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:48,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:48,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-10 08:36:48,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:48,188 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:48,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 08:36:48,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 08:36:48,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:48,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-10 08:36:48,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:48,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-10 08:36:48,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 08:36:48,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 08:36:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:36:48,245 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-10 08:36:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:48,322 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-10 08:36:48,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 08:36:48,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-10 08:36:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:48,324 INFO L225 Difference]: With dead ends: 52 [2018-11-10 08:36:48,324 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 08:36:48,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:36:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 08:36:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 08:36:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 08:36:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-10 08:36:48,332 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-10 08:36:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:48,332 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-10 08:36:48,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 08:36:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-10 08:36:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-10 08:36:48,334 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:48,334 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:48,335 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:48,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash 702878917, now seen corresponding path program 5 times [2018-11-10 08:36:48,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:48,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 213 proven. 64 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-10 08:36:48,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:48,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:48,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 08:36:48,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 08:36:48,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:48,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 422 proven. 118 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-11-10 08:36:48,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:48,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2018-11-10 08:36:48,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 08:36:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 08:36:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-10 08:36:48,546 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 13 states. [2018-11-10 08:36:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:48,796 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2018-11-10 08:36:48,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 08:36:48,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-11-10 08:36:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:48,798 INFO L225 Difference]: With dead ends: 111 [2018-11-10 08:36:48,799 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 08:36:48,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2018-11-10 08:36:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 08:36:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-11-10 08:36:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 08:36:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2018-11-10 08:36:48,807 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 123 [2018-11-10 08:36:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:48,808 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2018-11-10 08:36:48,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 08:36:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2018-11-10 08:36:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-10 08:36:48,810 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:48,810 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:48,810 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:48,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:48,811 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2018-11-10 08:36:48,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:48,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:48,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:48,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-10 08:36:48,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:48,913 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:48,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 08:36:48,970 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-10 08:36:48,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:48,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-10 08:36:49,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:49,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-10 08:36:49,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 08:36:49,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 08:36:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 08:36:49,030 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 9 states. [2018-11-10 08:36:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:49,131 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2018-11-10 08:36:49,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 08:36:49,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2018-11-10 08:36:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:49,132 INFO L225 Difference]: With dead ends: 80 [2018-11-10 08:36:49,132 INFO L226 Difference]: Without dead ends: 76 [2018-11-10 08:36:49,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 08:36:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-10 08:36:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2018-11-10 08:36:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-10 08:36:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2018-11-10 08:36:49,138 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 177 [2018-11-10 08:36:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:49,139 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2018-11-10 08:36:49,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 08:36:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2018-11-10 08:36:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-10 08:36:49,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:49,145 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:49,145 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:49,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1341952681, now seen corresponding path program 7 times [2018-11-10 08:36:49,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:49,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:49,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:49,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:49,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 274 proven. 1274 refuted. 0 times theorem prover too weak. 6167 trivial. 0 not checked. [2018-11-10 08:36:49,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:49,335 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:49,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:49,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 240 proven. 1545 refuted. 0 times theorem prover too weak. 5930 trivial. 0 not checked. [2018-11-10 08:36:49,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:49,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-11-10 08:36:49,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 08:36:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 08:36:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 08:36:49,511 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 11 states. [2018-11-10 08:36:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:49,650 INFO L93 Difference]: Finished difference Result 86 states and 128 transitions. [2018-11-10 08:36:49,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 08:36:49,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 368 [2018-11-10 08:36:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:49,652 INFO L225 Difference]: With dead ends: 86 [2018-11-10 08:36:49,652 INFO L226 Difference]: Without dead ends: 82 [2018-11-10 08:36:49,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-10 08:36:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-10 08:36:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-11-10 08:36:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-10 08:36:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2018-11-10 08:36:49,663 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 368 [2018-11-10 08:36:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:49,664 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2018-11-10 08:36:49,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 08:36:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2018-11-10 08:36:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-10 08:36:49,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:49,672 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:49,672 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:49,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1932846124, now seen corresponding path program 8 times [2018-11-10 08:36:49,672 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:49,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:49,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:49,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:36:49,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-11-10 08:36:49,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:49,905 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:49,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 08:36:50,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 08:36:50,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:50,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-11-10 08:36:50,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:50,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-10 08:36:50,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 08:36:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 08:36:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:36:50,157 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 12 states. [2018-11-10 08:36:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:50,315 INFO L93 Difference]: Finished difference Result 85 states and 130 transitions. [2018-11-10 08:36:50,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 08:36:50,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-11-10 08:36:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:50,317 INFO L225 Difference]: With dead ends: 85 [2018-11-10 08:36:50,317 INFO L226 Difference]: Without dead ends: 81 [2018-11-10 08:36:50,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-10 08:36:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-10 08:36:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-10 08:36:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-10 08:36:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2018-11-10 08:36:50,325 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 572 [2018-11-10 08:36:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:50,326 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2018-11-10 08:36:50,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 08:36:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2018-11-10 08:36:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2018-11-10 08:36:50,329 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:50,329 INFO L375 BasicCegarLoop]: trace histogram [129, 129, 104, 64, 64, 64, 64, 64, 64, 64, 40, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:50,329 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:50,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 109591711, now seen corresponding path program 9 times [2018-11-10 08:36:50,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:50,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:50,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:50,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:50,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 3144 proven. 1574 refuted. 0 times theorem prover too weak. 41726 trivial. 0 not checked. [2018-11-10 08:36:50,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:50,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:50,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 08:36:50,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-11-10 08:36:50,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:50,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 779 proven. 5264 refuted. 0 times theorem prover too weak. 40401 trivial. 0 not checked. [2018-11-10 08:36:51,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:51,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 13 [2018-11-10 08:36:51,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 08:36:51,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 08:36:51,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 08:36:51,324 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 13 states. [2018-11-10 08:36:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:51,466 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2018-11-10 08:36:51,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 08:36:51,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 885 [2018-11-10 08:36:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:51,468 INFO L225 Difference]: With dead ends: 90 [2018-11-10 08:36:51,468 INFO L226 Difference]: Without dead ends: 86 [2018-11-10 08:36:51,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 08:36:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-10 08:36:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-10 08:36:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-10 08:36:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 143 transitions. [2018-11-10 08:36:51,477 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 143 transitions. Word has length 885 [2018-11-10 08:36:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:51,478 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 143 transitions. [2018-11-10 08:36:51,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 08:36:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 143 transitions. [2018-11-10 08:36:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1636 [2018-11-10 08:36:51,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:51,489 INFO L375 BasicCegarLoop]: trace histogram [239, 239, 194, 119, 119, 119, 119, 119, 119, 119, 75, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:51,490 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:51,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1252276512, now seen corresponding path program 10 times [2018-11-10 08:36:51,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:51,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:51,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 7508 proven. 4531 refuted. 0 times theorem prover too weak. 148530 trivial. 0 not checked. [2018-11-10 08:36:52,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:52,422 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:52,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 08:36:52,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 08:36:52,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:52,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 2004 proven. 10027 refuted. 0 times theorem prover too weak. 148538 trivial. 0 not checked. [2018-11-10 08:36:53,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:53,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2018-11-10 08:36:53,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 08:36:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 08:36:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-11-10 08:36:53,569 INFO L87 Difference]: Start difference. First operand 86 states and 143 transitions. Second operand 18 states. [2018-11-10 08:36:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:53,793 INFO L93 Difference]: Finished difference Result 216 states and 983 transitions. [2018-11-10 08:36:53,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 08:36:53,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1635 [2018-11-10 08:36:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:53,798 INFO L225 Difference]: With dead ends: 216 [2018-11-10 08:36:53,799 INFO L226 Difference]: Without dead ends: 86 [2018-11-10 08:36:53,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1640 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2018-11-10 08:36:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-10 08:36:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-10 08:36:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-10 08:36:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2018-11-10 08:36:53,811 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 1635 [2018-11-10 08:36:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:53,812 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2018-11-10 08:36:53,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 08:36:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2018-11-10 08:36:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-11-10 08:36:53,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:36:53,826 INFO L375 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:36:53,827 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:36:53,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:36:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 11 times [2018-11-10 08:36:53,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:36:53,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:36:53,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:53,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:36:53,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:36:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:36:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-10 08:36:55,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:36:55,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:36:55,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 08:36:56,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 144 check-sat command(s) [2018-11-10 08:36:56,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:36:56,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:36:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-10 08:36:58,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:36:58,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-11-10 08:36:58,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-10 08:36:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-10 08:36:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 08:36:58,084 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 40 states. [2018-11-10 08:36:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:36:58,433 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2018-11-10 08:36:58,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 08:36:58,433 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-11-10 08:36:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:36:58,435 INFO L225 Difference]: With dead ends: 86 [2018-11-10 08:36:58,435 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 08:36:58,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 08:36:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 08:36:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 08:36:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 08:36:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 08:36:58,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2018-11-10 08:36:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:36:58,437 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 08:36:58,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-10 08:36:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 08:36:58,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 08:36:58,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 08:36:59,973 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 123 DAG size of output: 79 [2018-11-10 08:37:00,012 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 08:37:00,012 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 08:37:00,012 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 08:37:00,012 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 08:37:00,012 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 08:37:00,012 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 08:37:00,012 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-10 08:37:00,012 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-10 08:37:00,012 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-10 08:37:00,013 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-10 08:37:00,013 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-10 08:37:00,014 INFO L421 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (and (<= |fibo_#in~n| 6) (<= 6 |fibo_#in~n|))) (.cse0 (and (<= |fibo_#in~n| 2) (< 1 fibo_~n))) (.cse6 (<= 8 |fibo_#in~n|)) (.cse1 (and (<= 7 |fibo_#in~n|) (<= |fibo_#in~n| 7))) (.cse3 (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4))) (.cse4 (and (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3))) (.cse5 (and (<= 5 |fibo_#in~n|) (<= |fibo_#in~n| 5)))) (and (or .cse0 (<= 9 |fibo_#in~n|) .cse1 .cse2 .cse3 .cse4 .cse5 (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13))) (or .cse0 .cse6 (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3)) .cse1 .cse2 .cse3 .cse4) (or (and (<= |fibo_#t~ret0| 1) (<= 1 |fibo_#t~ret0|)) (< 3 |fibo_#in~n|)) (or .cse0 .cse6 .cse2 .cse3 .cse4 .cse5 (and (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|))) (or .cse0 .cse6 (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) .cse1 .cse2 .cse4 .cse5) (or .cse0 .cse6 .cse1 .cse3 .cse4 .cse5 (and (<= |fibo_#t~ret0| 5) (<= 5 |fibo_#t~ret0|))) (or (<= |fibo_#in~n| 9) (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34)) (<= 11 |fibo_#in~n|)) (let ((.cse7 (<= fibo_~n |fibo_#in~n|)) (.cse8 (<= |fibo_#in~n| fibo_~n))) (or (and .cse7 (<= 10 |fibo_#in~n|) .cse8) (and (<= |fibo_#t~ret0| 21) .cse7 (<= 21 |fibo_#t~ret0|) .cse8) (and (<= |fibo_#in~n| 8) .cse7 .cse8))))) [2018-11-10 08:37:00,014 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-10 08:37:00,014 INFO L425 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-10 08:37:00,014 INFO L425 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-10 08:37:00,014 INFO L428 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-10 08:37:00,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 08:37:00 BoogieIcfgContainer [2018-11-10 08:37:00,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 08:37:00,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 08:37:00,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 08:37:00,017 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 08:37:00,017 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:36:46" (3/4) ... [2018-11-10 08:37:00,021 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 08:37:00,026 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 08:37:00,027 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 08:37:00,027 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-10 08:37:00,031 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 08:37:00,031 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 08:37:00,032 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 08:37:00,060 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d75c6c89-28f6-4cf1-b566-594e9ab18e95/bin-2019/uautomizer/witness.graphml [2018-11-10 08:37:00,060 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 08:37:00,060 INFO L168 Benchmark]: Toolchain (without parser) took 13843.34 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 962.9 MB in the beginning and 2.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 187.9 MB. Max. memory is 11.5 GB. [2018-11-10 08:37:00,061 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 08:37:00,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.56 ms. Allocated memory is still 1.0 GB. Free memory was 962.9 MB in the beginning and 952.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 08:37:00,061 INFO L168 Benchmark]: Boogie Preprocessor took 15.49 ms. Allocated memory is still 1.0 GB. Free memory is still 952.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 08:37:00,062 INFO L168 Benchmark]: RCFGBuilder took 191.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 952.2 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2018-11-10 08:37:00,062 INFO L168 Benchmark]: TraceAbstraction took 13460.47 ms. Allocated memory was 1.2 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 2.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 11.5 GB. [2018-11-10 08:37:00,062 INFO L168 Benchmark]: Witness Printer took 43.17 ms. Allocated memory is still 3.1 GB. Free memory was 2.9 GB in the beginning and 2.8 GB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 11.5 GB. [2018-11-10 08:37:00,064 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 129.56 ms. Allocated memory is still 1.0 GB. Free memory was 962.9 MB in the beginning and 952.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.49 ms. Allocated memory is still 1.0 GB. Free memory is still 952.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 191.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 952.2 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13460.47 ms. Allocated memory was 1.2 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 2.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 11.5 GB. * Witness Printer took 43.17 ms. Allocated memory is still 3.1 GB. Free memory was 2.9 GB in the beginning and 2.8 GB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 13.4s OverallTime, 14 OverallIterations, 239 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 1.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 294 SDtfs, 299 SDslu, 2018 SDs, 0 SdLazy, 2178 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5799 GetRequests, 5491 SyntacticMatches, 92 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 146 PreInvPairs, 888 NumberOfFragments, 320 HoareAnnotationTreeSize, 146 FomulaSimplifications, 12090 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3779 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 10485 NumberOfCodeBlocks, 9587 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 10459 ConstructedInterpolants, 0 QuantifiedInterpolants, 21957081 SizeOfPredicates, 68 NumberOfNonLiveVariables, 9433 ConjunctsInSsa, 847 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 561130/649378 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...