./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 307542ef0214b83df72c59e51df6e57e6557ac8b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 22:45:58,052 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:45:58,053 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:45:58,063 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:45:58,064 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:45:58,064 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:45:58,065 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:45:58,067 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:45:58,068 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:45:58,069 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:45:58,070 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:45:58,070 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:45:58,071 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:45:58,071 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:45:58,072 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:45:58,072 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:45:58,073 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:45:58,074 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:45:58,076 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:45:58,076 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:45:58,077 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:45:58,078 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:45:58,079 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:45:58,079 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:45:58,079 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:45:58,080 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:45:58,081 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:45:58,081 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:45:58,082 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:45:58,083 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:45:58,083 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:45:58,084 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:45:58,084 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:45:58,084 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:45:58,085 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:45:58,085 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:45:58,086 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-22 22:45:58,094 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:45:58,094 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:45:58,095 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:45:58,095 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:45:58,096 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 22:45:58,096 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 22:45:58,096 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 22:45:58,096 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:45:58,096 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:45:58,097 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:45:58,098 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 22:45:58,098 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:45:58,098 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:45:58,098 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:45:58,098 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:45:58,098 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:45:58,099 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:45:58,099 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 22:45:58,100 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:45:58,100 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 22:45:58,100 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_7199d0e7-945b-4c15-b07c-628100986ef3/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 -> 307542ef0214b83df72c59e51df6e57e6557ac8b [2018-11-22 22:45:58,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:45:58,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:45:58,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:45:58,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:45:58,143 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:45:58,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-11-22 22:45:58,194 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/data/d5f78a0ce/e8c1952c59fd4cf3b0106d1bbfaff9d3/FLAGd854ba3b2 [2018-11-22 22:45:58,557 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:45:58,557 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-11-22 22:45:58,563 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/data/d5f78a0ce/e8c1952c59fd4cf3b0106d1bbfaff9d3/FLAGd854ba3b2 [2018-11-22 22:45:58,576 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/data/d5f78a0ce/e8c1952c59fd4cf3b0106d1bbfaff9d3 [2018-11-22 22:45:58,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:45:58,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:45:58,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:45:58,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:45:58,583 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:45:58,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22877cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58, skipping insertion in model container [2018-11-22 22:45:58,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:45:58,608 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:45:58,742 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:45:58,745 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:45:58,758 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:45:58,768 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:45:58,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58 WrapperNode [2018-11-22 22:45:58,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:45:58,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:45:58,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:45:58,770 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:45:58,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:45:58,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:45:58,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:45:58,790 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:45:58,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... [2018-11-22 22:45:58,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:45:58,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:45:58,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:45:58,804 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:45:58,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:45:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 22:45:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 22:45:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:45:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:45:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-22 22:45:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-22 22:45:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 22:45:58,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 22:45:59,026 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:45:59,026 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 22:45:59,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:45:59 BoogieIcfgContainer [2018-11-22 22:45:59,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:45:59,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:45:59,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:45:59,030 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:45:59,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:45:58" (1/3) ... [2018-11-22 22:45:59,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48915836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:45:59, skipping insertion in model container [2018-11-22 22:45:59,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:45:58" (2/3) ... [2018-11-22 22:45:59,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48915836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:45:59, skipping insertion in model container [2018-11-22 22:45:59,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:45:59" (3/3) ... [2018-11-22 22:45:59,034 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04_true-unreach-call_true-no-overflow.c [2018-11-22 22:45:59,042 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:45:59,048 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 22:45:59,062 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 22:45:59,084 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 22:45:59,085 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:45:59,085 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:45:59,085 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:45:59,085 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:45:59,085 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:45:59,085 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:45:59,086 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:45:59,086 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:45:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-22 22:45:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-22 22:45:59,106 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:45:59,107 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:45:59,109 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:45:59,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:45:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2018-11-22 22:45:59,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:45:59,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:45:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:45:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:45:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:45:59,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:45:59,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 22:45:59,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:45:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:45:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:45:59,290 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2018-11-22 22:45:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:45:59,429 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2018-11-22 22:45:59,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 22:45:59,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-22 22:45:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:45:59,439 INFO L225 Difference]: With dead ends: 55 [2018-11-22 22:45:59,440 INFO L226 Difference]: Without dead ends: 28 [2018-11-22 22:45:59,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:45:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-22 22:45:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-22 22:45:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-22 22:45:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-22 22:45:59,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2018-11-22 22:45:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:45:59,476 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-22 22:45:59,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:45:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-22 22:45:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-22 22:45:59,479 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:45:59,479 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:45:59,479 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:45:59,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:45:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2018-11-22 22:45:59,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:45:59,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:45:59,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:45:59,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:45:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 22:45:59,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:45:59,547 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:45:59,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:45:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:45:59,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:45:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 22:45:59,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:45:59,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-22 22:45:59,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:45:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:45:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:45:59,649 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2018-11-22 22:45:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:45:59,724 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2018-11-22 22:45:59,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 22:45:59,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-22 22:45:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:45:59,726 INFO L225 Difference]: With dead ends: 52 [2018-11-22 22:45:59,726 INFO L226 Difference]: Without dead ends: 30 [2018-11-22 22:45:59,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:45:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-22 22:45:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-22 22:45:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-22 22:45:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2018-11-22 22:45:59,733 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2018-11-22 22:45:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:45:59,733 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2018-11-22 22:45:59,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:45:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2018-11-22 22:45:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-22 22:45:59,735 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:45:59,735 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 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] [2018-11-22 22:45:59,735 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:45:59,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:45:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2018-11-22 22:45:59,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:45:59,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:45:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:45:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:45:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:45:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-22 22:45:59,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:45:59,822 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:45:59,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:45:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:45:59,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:45:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-22 22:45:59,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:45:59,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-11-22 22:45:59,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:45:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:45:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:45:59,944 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 11 states. [2018-11-22 22:46:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:00,383 INFO L93 Difference]: Finished difference Result 87 states and 149 transitions. [2018-11-22 22:46:00,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 22:46:00,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-11-22 22:46:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:00,386 INFO L225 Difference]: With dead ends: 87 [2018-11-22 22:46:00,386 INFO L226 Difference]: Without dead ends: 79 [2018-11-22 22:46:00,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:46:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-22 22:46:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-22 22:46:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-22 22:46:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2018-11-22 22:46:00,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 35 [2018-11-22 22:46:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:00,406 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2018-11-22 22:46:00,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:46:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2018-11-22 22:46:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-22 22:46:00,409 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:00,409 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:00,410 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:00,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2018-11-22 22:46:00,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:00,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:00,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:00,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:46:00,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-11-22 22:46:00,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:00,531 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:00,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:46:00,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:46:00,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:00,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-22 22:46:00,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:00,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 13 [2018-11-22 22:46:00,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:46:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:46:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:46:00,660 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 13 states. [2018-11-22 22:46:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:00,987 INFO L93 Difference]: Finished difference Result 227 states and 605 transitions. [2018-11-22 22:46:00,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 22:46:00,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2018-11-22 22:46:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:00,996 INFO L225 Difference]: With dead ends: 227 [2018-11-22 22:46:00,998 INFO L226 Difference]: Without dead ends: 156 [2018-11-22 22:46:01,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2018-11-22 22:46:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-22 22:46:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 85. [2018-11-22 22:46:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-22 22:46:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 150 transitions. [2018-11-22 22:46:01,029 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 150 transitions. Word has length 82 [2018-11-22 22:46:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:01,030 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 150 transitions. [2018-11-22 22:46:01,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:46:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 150 transitions. [2018-11-22 22:46:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-22 22:46:01,037 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:01,038 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 18, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:01,038 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:01,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 757188394, now seen corresponding path program 3 times [2018-11-22 22:46:01,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:01,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:01,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:01,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 262 proven. 400 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2018-11-22 22:46:01,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:01,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:01,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:46:01,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-22 22:46:01,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:01,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 757 proven. 22 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2018-11-22 22:46:01,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:01,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 22:46:01,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 22:46:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:46:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:46:01,303 INFO L87 Difference]: Start difference. First operand 85 states and 150 transitions. Second operand 9 states. [2018-11-22 22:46:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:01,463 INFO L93 Difference]: Finished difference Result 197 states and 475 transitions. [2018-11-22 22:46:01,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:46:01,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2018-11-22 22:46:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:01,467 INFO L225 Difference]: With dead ends: 197 [2018-11-22 22:46:01,467 INFO L226 Difference]: Without dead ends: 107 [2018-11-22 22:46:01,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:46:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-22 22:46:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-11-22 22:46:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-22 22:46:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 205 transitions. [2018-11-22 22:46:01,489 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 205 transitions. Word has length 201 [2018-11-22 22:46:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:01,489 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 205 transitions. [2018-11-22 22:46:01,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 22:46:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 205 transitions. [2018-11-22 22:46:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-22 22:46:01,493 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:01,493 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 19, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:01,493 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:01,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:01,494 INFO L82 PathProgramCache]: Analyzing trace with hash -149698588, now seen corresponding path program 4 times [2018-11-22 22:46:01,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:01,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:01,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 252 proven. 443 refuted. 0 times theorem prover too weak. 1468 trivial. 0 not checked. [2018-11-22 22:46:01,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:01,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:01,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:46:01,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:46:01,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:01,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 1195 proven. 150 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2018-11-22 22:46:01,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:01,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2018-11-22 22:46:01,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 22:46:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 22:46:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:46:01,796 INFO L87 Difference]: Start difference. First operand 107 states and 205 transitions. Second operand 12 states. [2018-11-22 22:46:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:02,015 INFO L93 Difference]: Finished difference Result 172 states and 368 transitions. [2018-11-22 22:46:02,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 22:46:02,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 208 [2018-11-22 22:46:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:02,017 INFO L225 Difference]: With dead ends: 172 [2018-11-22 22:46:02,017 INFO L226 Difference]: Without dead ends: 82 [2018-11-22 22:46:02,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:46:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-22 22:46:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-11-22 22:46:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-22 22:46:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 146 transitions. [2018-11-22 22:46:02,030 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 146 transitions. Word has length 208 [2018-11-22 22:46:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:02,030 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 146 transitions. [2018-11-22 22:46:02,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 22:46:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 146 transitions. [2018-11-22 22:46:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-22 22:46:02,033 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:02,033 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:02,034 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:02,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2010206023, now seen corresponding path program 5 times [2018-11-22 22:46:02,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:02,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:02,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:02,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:02,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 103 proven. 171 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-22 22:46:02,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:02,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:02,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:46:02,185 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-22 22:46:02,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:02,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 286 proven. 71 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-11-22 22:46:02,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:02,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-22 22:46:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:46:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:46:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:46:02,233 INFO L87 Difference]: Start difference. First operand 82 states and 146 transitions. Second operand 13 states. [2018-11-22 22:46:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:02,459 INFO L93 Difference]: Finished difference Result 150 states and 285 transitions. [2018-11-22 22:46:02,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:46:02,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2018-11-22 22:46:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:02,461 INFO L225 Difference]: With dead ends: 150 [2018-11-22 22:46:02,461 INFO L226 Difference]: Without dead ends: 85 [2018-11-22 22:46:02,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-11-22 22:46:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-22 22:46:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2018-11-22 22:46:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-22 22:46:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 138 transitions. [2018-11-22 22:46:02,472 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 138 transitions. Word has length 108 [2018-11-22 22:46:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:02,472 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 138 transitions. [2018-11-22 22:46:02,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:46:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 138 transitions. [2018-11-22 22:46:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-22 22:46:02,475 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:02,475 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:02,475 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:02,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 6 times [2018-11-22 22:46:02,475 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:02,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:02,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:02,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:02,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 297 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-11-22 22:46:02,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:02,598 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:02,606 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:46:02,668 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-22 22:46:02,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:02,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-22 22:46:02,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:02,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-22 22:46:02,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 22:46:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 22:46:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:46:02,742 INFO L87 Difference]: Start difference. First operand 82 states and 138 transitions. Second operand 14 states. [2018-11-22 22:46:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:03,046 INFO L93 Difference]: Finished difference Result 165 states and 311 transitions. [2018-11-22 22:46:03,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 22:46:03,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 134 [2018-11-22 22:46:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:03,050 INFO L225 Difference]: With dead ends: 165 [2018-11-22 22:46:03,050 INFO L226 Difference]: Without dead ends: 100 [2018-11-22 22:46:03,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2018-11-22 22:46:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-11-22 22:46:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-11-22 22:46:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-22 22:46:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 170 transitions. [2018-11-22 22:46:03,064 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 170 transitions. Word has length 134 [2018-11-22 22:46:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:03,064 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 170 transitions. [2018-11-22 22:46:03,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 22:46:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 170 transitions. [2018-11-22 22:46:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-22 22:46:03,067 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:03,067 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:03,068 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:03,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:03,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 7 times [2018-11-22 22:46:03,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:03,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:03,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:03,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:03,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-11-22 22:46:03,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:03,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:03,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:46:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:03,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-11-22 22:46:03,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:03,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-22 22:46:03,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 22:46:03,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 22:46:03,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:46:03,388 INFO L87 Difference]: Start difference. First operand 97 states and 170 transitions. Second operand 20 states. [2018-11-22 22:46:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:03,931 INFO L93 Difference]: Finished difference Result 211 states and 413 transitions. [2018-11-22 22:46:03,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-22 22:46:03,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 160 [2018-11-22 22:46:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:03,935 INFO L225 Difference]: With dead ends: 211 [2018-11-22 22:46:03,935 INFO L226 Difference]: Without dead ends: 131 [2018-11-22 22:46:03,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2018-11-22 22:46:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-22 22:46:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2018-11-22 22:46:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-22 22:46:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 221 transitions. [2018-11-22 22:46:03,948 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 221 transitions. Word has length 160 [2018-11-22 22:46:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:03,949 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 221 transitions. [2018-11-22 22:46:03,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 22:46:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 221 transitions. [2018-11-22 22:46:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-22 22:46:03,951 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:03,951 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:03,951 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:03,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2018-11-22 22:46:03,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:03,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:03,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:03,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:46:03,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-11-22 22:46:04,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:04,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:04,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:46:04,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:46:04,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:04,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-11-22 22:46:04,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:04,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-22 22:46:04,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 22:46:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 22:46:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:46:04,231 INFO L87 Difference]: Start difference. First operand 121 states and 221 transitions. Second operand 21 states. [2018-11-22 22:46:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:04,832 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2018-11-22 22:46:04,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-22 22:46:04,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2018-11-22 22:46:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:04,835 INFO L225 Difference]: With dead ends: 250 [2018-11-22 22:46:04,835 INFO L226 Difference]: Without dead ends: 146 [2018-11-22 22:46:04,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2018-11-22 22:46:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-22 22:46:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-11-22 22:46:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-22 22:46:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 257 transitions. [2018-11-22 22:46:04,853 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 257 transitions. Word has length 173 [2018-11-22 22:46:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:04,854 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 257 transitions. [2018-11-22 22:46:04,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 22:46:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 257 transitions. [2018-11-22 22:46:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-22 22:46:04,857 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:46:04,857 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:46:04,857 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:46:04,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:46:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 9 times [2018-11-22 22:46:04,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:46:04,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:46:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:04,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:46:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:46:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:46:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-11-22 22:46:05,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:46:05,086 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/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 [2018-11-22 22:46:05,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:46:05,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-22 22:46:05,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:46:05,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:46:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-11-22 22:46:05,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:46:05,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-22 22:46:05,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 22:46:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 22:46:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:46:05,174 INFO L87 Difference]: Start difference. First operand 136 states and 257 transitions. Second operand 23 states. [2018-11-22 22:46:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:46:05,451 INFO L93 Difference]: Finished difference Result 165 states and 304 transitions. [2018-11-22 22:46:05,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-22 22:46:05,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2018-11-22 22:46:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:46:05,452 INFO L225 Difference]: With dead ends: 165 [2018-11-22 22:46:05,452 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 22:46:05,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:46:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 22:46:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 22:46:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 22:46:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 22:46:05,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2018-11-22 22:46:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:46:05,455 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:46:05,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 22:46:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 22:46:05,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 22:46:05,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 22:46:05,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 22:46:06,918 WARN L180 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 38 [2018-11-22 22:46:06,954 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 22:46:06,954 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 22:46:06,954 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 22:46:06,954 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 22:46:06,954 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 22:46:06,954 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 22:46:06,954 INFO L448 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-22 22:46:06,954 INFO L451 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2018-11-22 22:46:06,954 INFO L444 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-22 22:46:06,954 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L444 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n)) [2018-11-22 22:46:06,955 INFO L444 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse4 (= |ackermann_#in~m| ackermann_~m)) (.cse5 (<= |ackermann_#in~n| ackermann_~n)) (.cse7 (<= 2 |ackermann_#t~ret1|))) (let ((.cse0 (and .cse4 .cse5 .cse7))) (let ((.cse3 (and (<= 1 |ackermann_#in~m|) .cse0 (<= 6 |ackermann_#t~ret1|))) (.cse1 (<= |ackermann_#in~m| 1)) (.cse2 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= |ackermann_#in~n| 1))) (and (or (and (<= 4 |ackermann_#t~ret1|) .cse0 (<= |ackermann_#in~n| 3) .cse1) (and .cse2 .cse0 (<= |ackermann_#in~n| 4) .cse1) .cse3 (and .cse4 .cse5 .cse6 .cse1 .cse7) (and (<= 3 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 2) .cse5 .cse4)) (< 0 |ackermann_#in~m|) (or .cse3 .cse1 (and .cse2 (<= |ackermann_#in~m| 2)) .cse6))))) [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2018-11-22 22:46:06,955 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2018-11-22 22:46:06,956 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2018-11-22 22:46:06,956 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2018-11-22 22:46:06,956 INFO L448 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-22 22:46:06,956 INFO L448 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-11-22 22:46:06,956 INFO L451 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2018-11-22 22:46:06,956 INFO L448 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-22 22:46:06,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:46:06 BoogieIcfgContainer [2018-11-22 22:46:06,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 22:46:06,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:46:06,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:46:06,959 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:46:06,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:45:59" (3/4) ... [2018-11-22 22:46:06,963 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 22:46:06,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 22:46:06,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-11-22 22:46:06,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 22:46:06,975 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-22 22:46:06,975 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 22:46:06,975 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 22:46:07,013 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7199d0e7-945b-4c15-b07c-628100986ef3/bin-2019/uautomizer/witness.graphml [2018-11-22 22:46:07,013 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:46:07,015 INFO L168 Benchmark]: Toolchain (without parser) took 8435.07 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 287.3 MB). Free memory was 959.3 MB in the beginning and 1.1 GB in the end (delta: -120.4 MB). Peak memory consumption was 167.0 MB. Max. memory is 11.5 GB. [2018-11-22 22:46:07,015 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:46:07,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.94 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:46:07,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.73 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:46:07,016 INFO L168 Benchmark]: Boogie Preprocessor took 13.90 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:46:07,017 INFO L168 Benchmark]: RCFGBuilder took 222.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:46:07,017 INFO L168 Benchmark]: TraceAbstraction took 7931.44 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 150.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.7 MB). Peak memory consumption was 361.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:46:07,020 INFO L168 Benchmark]: Witness Printer took 54.34 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. [2018-11-22 22:46:07,022 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 188.94 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.73 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.90 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 222.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7931.44 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 150.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.7 MB). Peak memory consumption was 361.4 MB. Max. memory is 11.5 GB. * Witness Printer took 54.34 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: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 7.8s OverallTime, 11 OverallIterations, 30 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 1.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 300 SDtfs, 251 SDslu, 1341 SDs, 0 SdLazy, 2604 SolverSat, 600 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1673 GetRequests, 1379 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred 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, 11 MinimizatonAttempts, 97 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 589 PreInvPairs, 1301 NumberOfFragments, 155 HoareAnnotationTreeSize, 589 FomulaSimplifications, 38296 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 9 FomulaSimplificationsInter, 5037 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 2633 NumberOfCodeBlocks, 2337 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 2612 ConstructedInterpolants, 0 QuantifiedInterpolants, 672878 SizeOfPredicates, 74 NumberOfNonLiveVariables, 2956 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 17335/20566 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...