./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/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 e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:47:57,059 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:47:57,061 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:47:57,069 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:47:57,069 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:47:57,070 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:47:57,071 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:47:57,072 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:47:57,073 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:47:57,074 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:47:57,074 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:47:57,075 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:47:57,075 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:47:57,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:47:57,077 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:47:57,077 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:47:57,078 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:47:57,079 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:47:57,080 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:47:57,081 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:47:57,082 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:47:57,083 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:47:57,084 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:47:57,085 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:47:57,085 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:47:57,085 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:47:57,086 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:47:57,087 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:47:57,087 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:47:57,088 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:47:57,088 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:47:57,089 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:47:57,089 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:47:57,089 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:47:57,089 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:47:57,090 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:47:57,090 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 13:47:57,100 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:47:57,100 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:47:57,101 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:47:57,101 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 13:47:57,101 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:47:57,101 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:47:57,102 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:47:57,102 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:47:57,103 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:47:57,103 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:47:57,104 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:47:57,104 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:47:57,105 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:47:57,105 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:47:57,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:47:57,105 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_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/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 -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2018-11-18 13:47:57,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:47:57,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:47:57,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:47:57,141 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:47:57,141 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:47:57,141 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-18 13:47:57,184 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/data/b843af7eb/269a4fe229a74385ad2dd330289eaa11/FLAG67ebce847 [2018-11-18 13:47:57,569 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:47:57,569 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/sv-benchmarks/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-18 13:47:57,573 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/data/b843af7eb/269a4fe229a74385ad2dd330289eaa11/FLAG67ebce847 [2018-11-18 13:47:57,581 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/data/b843af7eb/269a4fe229a74385ad2dd330289eaa11 [2018-11-18 13:47:57,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:47:57,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:47:57,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:47:57,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:47:57,588 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:47:57,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb6de22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57, skipping insertion in model container [2018-11-18 13:47:57,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:47:57,608 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:47:57,710 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:47:57,712 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:47:57,721 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:47:57,729 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:47:57,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57 WrapperNode [2018-11-18 13:47:57,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:47:57,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:47:57,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:47:57,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:47:57,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... [2018-11-18 13:47:57,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:47:57,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:47:57,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:47:57,747 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:47:57,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:47:57,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:47:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:47:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 13:47:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 13:47:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:47:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 13:47:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:47:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 13:47:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 13:47:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:47:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:47:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:47:57,960 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:47:57,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:57 BoogieIcfgContainer [2018-11-18 13:47:57,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:47:57,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:47:57,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:47:57,963 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:47:57,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:47:57" (1/3) ... [2018-11-18 13:47:57,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39538c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:47:57, skipping insertion in model container [2018-11-18 13:47:57,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:57" (2/3) ... [2018-11-18 13:47:57,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39538c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:47:57, skipping insertion in model container [2018-11-18 13:47:57,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:57" (3/3) ... [2018-11-18 13:47:57,965 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-18 13:47:57,971 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:47:57,975 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:47:57,984 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:47:58,002 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:47:58,003 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:47:58,003 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:47:58,003 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:47:58,003 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:47:58,003 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:47:58,003 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:47:58,004 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:47:58,004 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:47:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-18 13:47:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:47:58,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:58,021 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:58,022 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:58,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-18 13:47:58,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:58,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:58,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:47:58,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:47:58,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:47:58,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:47:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:47:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:47:58,152 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-18 13:47:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:58,235 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-18 13:47:58,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:47:58,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 13:47:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:58,245 INFO L225 Difference]: With dead ends: 44 [2018-11-18 13:47:58,245 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 13:47:58,248 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:47:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 13:47:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 13:47:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:47:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 13:47:58,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-18 13:47:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:58,276 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 13:47:58,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:47:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 13:47:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:47:58,277 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:58,277 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:58,277 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:58,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-18 13:47:58,278 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:58,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:58,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:47:58,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:47:58,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:47:58,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:47:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:47:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:47:58,333 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-18 13:47:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:58,401 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-18 13:47:58,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:47:58,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 13:47:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:58,403 INFO L225 Difference]: With dead ends: 36 [2018-11-18 13:47:58,403 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 13:47:58,403 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:47:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 13:47:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 13:47:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:47:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 13:47:58,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-18 13:47:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:58,408 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 13:47:58,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:47:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 13:47:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 13:47:58,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:58,409 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:58,409 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:58,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:58,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-18 13:47:58,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:58,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 13:47:58,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:58,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:58,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 13:47:58,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:58,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-18 13:47:58,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:47:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:47:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:47:58,578 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-18 13:47:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:58,740 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-18 13:47:58,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 13:47:58,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-18 13:47:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:58,741 INFO L225 Difference]: With dead ends: 58 [2018-11-18 13:47:58,741 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 13:47:58,742 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:47:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 13:47:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-18 13:47:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 13:47:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-18 13:47:58,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-18 13:47:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:58,749 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-18 13:47:58,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:47:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-18 13:47:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 13:47:58,750 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:58,750 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:58,750 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:58,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-18 13:47:58,751 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:58,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:58,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 13:47:58,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:58,806 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:58,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 13:47:58,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:58,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 13:47:58,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:47:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:47:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:47:58,846 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-18 13:47:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:58,931 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-18 13:47:58,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:47:58,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-18 13:47:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:58,933 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:47:58,933 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:47:58,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:47:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:47:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-18 13:47:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 13:47:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-18 13:47:58,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-18 13:47:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:58,940 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-18 13:47:58,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:47:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-18 13:47:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 13:47:58,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:58,942 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:58,942 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:58,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-18 13:47:58,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:58,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:58,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 13:47:58,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:58,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:59,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 13:47:59,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:59,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-18 13:47:59,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:47:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:47:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:47:59,101 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-18 13:47:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:59,227 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-18 13:47:59,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 13:47:59,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-18 13:47:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:59,229 INFO L225 Difference]: With dead ends: 70 [2018-11-18 13:47:59,229 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:47:59,230 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:47:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:47:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 13:47:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 13:47:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-18 13:47:59,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-18 13:47:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:59,238 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-18 13:47:59,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:47:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-18 13:47:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 13:47:59,239 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:59,239 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:59,239 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:59,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-18 13:47:59,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:59,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:59,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:47:59,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:59,289 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:59,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 13:47:59,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:59,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-18 13:47:59,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:47:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:47:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:47:59,344 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-18 13:47:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:59,435 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-18 13:47:59,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 13:47:59,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-18 13:47:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:59,437 INFO L225 Difference]: With dead ends: 61 [2018-11-18 13:47:59,437 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 13:47:59,438 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:47:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 13:47:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-18 13:47:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 13:47:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-18 13:47:59,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-18 13:47:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:59,450 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-18 13:47:59,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:47:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-18 13:47:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-18 13:47:59,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:59,452 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:59,452 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:59,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-18 13:47:59,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:59,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 13:47:59,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:59,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:59,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 13:47:59,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:59,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-18 13:47:59,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:47:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:47:59,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:47:59,594 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-18 13:47:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:47:59,695 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-18 13:47:59,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 13:47:59,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-18 13:47:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:47:59,697 INFO L225 Difference]: With dead ends: 71 [2018-11-18 13:47:59,698 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 13:47:59,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:47:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 13:47:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-18 13:47:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 13:47:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-18 13:47:59,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-18 13:47:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:47:59,709 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-18 13:47:59,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:47:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-18 13:47:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 13:47:59,712 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:47:59,712 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:47:59,712 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:47:59,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:47:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-18 13:47:59,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:47:59,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:47:59,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:47:59,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:47:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:47:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-18 13:47:59,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:47:59,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:47:59,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:47:59,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:47:59,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:47:59,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:47:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-18 13:47:59,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:47:59,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-18 13:47:59,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 13:47:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 13:47:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:47:59,895 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 14 states. [2018-11-18 13:48:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:00,149 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2018-11-18 13:48:00,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 13:48:00,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2018-11-18 13:48:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:00,151 INFO L225 Difference]: With dead ends: 127 [2018-11-18 13:48:00,151 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 13:48:00,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-11-18 13:48:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 13:48:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-11-18 13:48:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-18 13:48:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2018-11-18 13:48:00,163 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 80 [2018-11-18 13:48:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:00,164 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2018-11-18 13:48:00,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 13:48:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2018-11-18 13:48:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-18 13:48:00,166 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:00,166 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:00,168 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:00,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash 733803902, now seen corresponding path program 1 times [2018-11-18 13:48:00,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:00,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:00,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:00,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:48:00,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 88 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-11-18 13:48:00,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:00,289 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:00,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:48:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:00,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-11-18 13:48:00,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:00,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2018-11-18 13:48:00,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 13:48:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 13:48:00,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:48:00,392 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand 18 states. [2018-11-18 13:48:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:00,761 INFO L93 Difference]: Finished difference Result 171 states and 317 transitions. [2018-11-18 13:48:00,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 13:48:00,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 108 [2018-11-18 13:48:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:00,763 INFO L225 Difference]: With dead ends: 171 [2018-11-18 13:48:00,763 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 13:48:00,764 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2018-11-18 13:48:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 13:48:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2018-11-18 13:48:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 13:48:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2018-11-18 13:48:00,776 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 108 [2018-11-18 13:48:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:00,777 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2018-11-18 13:48:00,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 13:48:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2018-11-18 13:48:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-18 13:48:00,779 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:00,780 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:00,780 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:00,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash 367128822, now seen corresponding path program 2 times [2018-11-18 13:48:00,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:00,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:00,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:00,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:48:00,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-18 13:48:00,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:00,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:00,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:48:00,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:48:00,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:48:00,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-18 13:48:00,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:00,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-18 13:48:00,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 13:48:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 13:48:00,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:48:00,975 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand 15 states. [2018-11-18 13:48:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:01,318 INFO L93 Difference]: Finished difference Result 212 states and 384 transitions. [2018-11-18 13:48:01,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 13:48:01,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-11-18 13:48:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:01,320 INFO L225 Difference]: With dead ends: 212 [2018-11-18 13:48:01,320 INFO L226 Difference]: Without dead ends: 140 [2018-11-18 13:48:01,321 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-11-18 13:48:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-18 13:48:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2018-11-18 13:48:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-18 13:48:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 209 transitions. [2018-11-18 13:48:01,336 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 209 transitions. Word has length 83 [2018-11-18 13:48:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:01,336 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 209 transitions. [2018-11-18 13:48:01,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 13:48:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 209 transitions. [2018-11-18 13:48:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-18 13:48:01,340 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:01,340 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 10, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:01,341 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:01,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1102743919, now seen corresponding path program 1 times [2018-11-18 13:48:01,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:01,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:01,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:01,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:48:01,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 116 proven. 91 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-11-18 13:48:01,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:01,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:01,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:48:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:01,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 82 proven. 108 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-11-18 13:48:01,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:01,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2018-11-18 13:48:01,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 13:48:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 13:48:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:48:01,590 INFO L87 Difference]: Start difference. First operand 128 states and 209 transitions. Second operand 15 states. [2018-11-18 13:48:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:01,821 INFO L93 Difference]: Finished difference Result 300 states and 572 transitions. [2018-11-18 13:48:01,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 13:48:01,822 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 151 [2018-11-18 13:48:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:01,823 INFO L225 Difference]: With dead ends: 300 [2018-11-18 13:48:01,823 INFO L226 Difference]: Without dead ends: 88 [2018-11-18 13:48:01,824 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-11-18 13:48:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-18 13:48:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2018-11-18 13:48:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-18 13:48:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2018-11-18 13:48:01,830 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 151 [2018-11-18 13:48:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:01,830 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2018-11-18 13:48:01,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 13:48:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2018-11-18 13:48:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-18 13:48:01,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:01,831 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:01,831 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:01,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:01,832 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 2 times [2018-11-18 13:48:01,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:01,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:01,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:48:01,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-11-18 13:48:01,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:01,912 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:01,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:48:01,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:48:01,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:48:01,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-11-18 13:48:02,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:02,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-11-18 13:48:02,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:48:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:48:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:48:02,014 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2018-11-18 13:48:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:02,159 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2018-11-18 13:48:02,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 13:48:02,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2018-11-18 13:48:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:02,159 INFO L225 Difference]: With dead ends: 155 [2018-11-18 13:48:02,160 INFO L226 Difference]: Without dead ends: 85 [2018-11-18 13:48:02,160 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-11-18 13:48:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-18 13:48:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2018-11-18 13:48:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 13:48:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-11-18 13:48:02,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 108 [2018-11-18 13:48:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:02,166 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-11-18 13:48:02,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:48:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-11-18 13:48:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-18 13:48:02,167 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:02,167 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:02,167 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:02,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 3 times [2018-11-18 13:48:02,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:02,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:02,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:02,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:48:02,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-11-18 13:48:02,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:02,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:02,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:48:02,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 13:48:02,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:48:02,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-11-18 13:48:02,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:02,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 13:48:02,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:48:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:48:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:48:02,269 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 7 states. [2018-11-18 13:48:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:02,355 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2018-11-18 13:48:02,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:48:02,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2018-11-18 13:48:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:02,356 INFO L225 Difference]: With dead ends: 96 [2018-11-18 13:48:02,356 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 13:48:02,357 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:48:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 13:48:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 13:48:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 13:48:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2018-11-18 13:48:02,361 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 96 [2018-11-18 13:48:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:02,361 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2018-11-18 13:48:02,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:48:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2018-11-18 13:48:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 13:48:02,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:48:02,363 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:48:02,363 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:48:02,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:48:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 4 times [2018-11-18 13:48:02,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:48:02,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:48:02,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:02,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:48:02,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:48:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:48:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2018-11-18 13:48:02,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:48:02,663 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:48:02,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:48:02,693 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:48:02,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:48:02,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:48:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2018-11-18 13:48:03,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:48:03,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2018-11-18 13:48:03,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 13:48:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 13:48:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-18 13:48:03,004 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 28 states. [2018-11-18 13:48:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:48:03,104 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2018-11-18 13:48:03,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 13:48:03,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-18 13:48:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:48:03,105 INFO L225 Difference]: With dead ends: 72 [2018-11-18 13:48:03,105 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:48:03,105 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-18 13:48:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:48:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:48:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:48:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:48:03,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2018-11-18 13:48:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:48:03,106 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:48:03,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 13:48:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:48:03,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:48:03,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:48:03,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,257 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,259 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,263 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,266 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,273 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,282 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,287 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,290 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,291 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,291 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,292 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,297 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:48:03,623 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2018-11-18 13:48:03,625 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 13:48:03,625 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:48:03,625 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:48:03,625 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:48:03,626 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L421 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L425 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-18 13:48:03,626 INFO L428 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-18 13:48:03,627 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (<= |fibo2_#in~n| 2) (< 3 |fibo2_#in~n|)) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L421 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (< 3 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 (<= |fibo2_#in~n| 3) (<= 2 fibo2_~n)) (and .cse0 .cse1 (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (and .cse0 (<= 5 |fibo2_#in~n|) .cse1))) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)))) [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L428 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-18 13:48:03,627 INFO L421 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-18 13:48:03,627 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 13:48:03,627 INFO L421 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (<= 4 fibo1_~n) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (< 1 fibo1_~n) (<= |fibo1_#in~n| 2)) (and .cse0 (<= 3 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)))) (or (<= |fibo1_#in~n| 4) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= 6 |fibo1_#in~n|))) [2018-11-18 13:48:03,628 INFO L425 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-18 13:48:03,628 INFO L425 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-18 13:48:03,628 INFO L425 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-18 13:48:03,628 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-18 13:48:03,628 INFO L425 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-18 13:48:03,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:48:03 BoogieIcfgContainer [2018-11-18 13:48:03,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:48:03,630 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:48:03,630 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:48:03,631 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:48:03,631 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:57" (3/4) ... [2018-11-18 13:48:03,634 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:48:03,639 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:48:03,640 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:48:03,640 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-18 13:48:03,640 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-18 13:48:03,643 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 13:48:03,643 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 13:48:03,644 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:48:03,674 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c92b4af7-fd54-4d26-89c4-fb126c52cbfa/bin-2019/uautomizer/witness.graphml [2018-11-18 13:48:03,674 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:48:03,675 INFO L168 Benchmark]: Toolchain (without parser) took 6090.11 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 316.7 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -167.1 MB). Peak memory consumption was 149.6 MB. Max. memory is 11.5 GB. [2018-11-18 13:48:03,675 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 977.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:48:03,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.82 ms. Allocated memory is still 1.0 GB. Free memory was 956.5 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:48:03,676 INFO L168 Benchmark]: Boogie Preprocessor took 16.43 ms. Allocated memory is still 1.0 GB. Free memory was 945.7 MB in the beginning and 940.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:48:03,676 INFO L168 Benchmark]: RCFGBuilder took 214.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -178.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:48:03,676 INFO L168 Benchmark]: TraceAbstraction took 5669.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 176.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.3 MB). Peak memory consumption was 172.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:48:03,677 INFO L168 Benchmark]: Witness Printer took 43.58 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:48:03,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 977.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.82 ms. Allocated memory is still 1.0 GB. Free memory was 956.5 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.43 ms. Allocated memory is still 1.0 GB. Free memory was 945.7 MB in the beginning and 940.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -178.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5669.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 176.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.3 MB). Peak memory consumption was 172.4 MB. Max. memory is 11.5 GB. * Witness Printer took 43.58 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 5.6s OverallTime, 14 OverallIterations, 12 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 406 SDtfs, 451 SDslu, 2767 SDs, 0 SdLazy, 2811 SolverSat, 387 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1147 GetRequests, 913 SyntacticMatches, 11 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=10, 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, 103 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 332 PreInvPairs, 540 NumberOfFragments, 144 HoareAnnotationTreeSize, 332 FomulaSimplifications, 8462 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1443 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1869 NumberOfCodeBlocks, 1808 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1843 ConstructedInterpolants, 0 QuantifiedInterpolants, 322003 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1922 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 3112/3810 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...