./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:46:44,086 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:46:44,088 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:46:44,097 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:46:44,098 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:46:44,098 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:46:44,100 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:46:44,101 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:46:44,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:46:44,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:46:44,104 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:46:44,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:46:44,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:46:44,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:46:44,106 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:46:44,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:46:44,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:46:44,109 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:46:44,111 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:46:44,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:46:44,113 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:46:44,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:46:44,116 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:46:44,116 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:46:44,117 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:46:44,117 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:46:44,118 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:46:44,118 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:46:44,120 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:46:44,121 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:46:44,121 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:46:44,121 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:46:44,122 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:46:44,122 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:46:44,122 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:46:44,131 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:46:44,132 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 22:46:44,145 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:46:44,145 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:46:44,146 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:46:44,146 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:46:44,149 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:46:44,149 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:46:44,149 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:46:44,149 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:46:44,150 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:46:44,151 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:46:44,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:46:44,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:46:44,152 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:46:44,152 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:46:44,152 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:46:44,152 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:46:44,152 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:46:44,152 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_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 -> ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 [2018-10-26 22:46:44,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:46:44,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:46:44,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:46:44,199 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:46:44,199 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:46:44,200 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-10-26 22:46:44,241 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/data/95564f9a5/3b73887372eb4c44b306bb53090e6e1e/FLAG03c9de1c7 [2018-10-26 22:46:44,589 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:46:44,592 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-10-26 22:46:44,597 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/data/95564f9a5/3b73887372eb4c44b306bb53090e6e1e/FLAG03c9de1c7 [2018-10-26 22:46:44,609 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/data/95564f9a5/3b73887372eb4c44b306bb53090e6e1e [2018-10-26 22:46:44,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:46:44,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:46:44,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:46:44,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:46:44,616 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:46:44,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b90395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44, skipping insertion in model container [2018-10-26 22:46:44,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:46:44,644 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:46:44,759 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:46:44,761 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:46:44,774 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:46:44,784 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:46:44,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44 WrapperNode [2018-10-26 22:46:44,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:46:44,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:46:44,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:46:44,786 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:46:44,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... [2018-10-26 22:46:44,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:46:44,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:46:44,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:46:44,810 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:46:44,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 [2018-10-26 22:46:44,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 22:46:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:46:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-10-26 22:46:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-10-26 22:46:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 22:46:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 22:46:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:46:45,313 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:46:45,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:46:45 BoogieIcfgContainer [2018-10-26 22:46:45,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:46:45,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:46:45,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:46:45,317 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:46:45,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:46:44" (1/3) ... [2018-10-26 22:46:45,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d267f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:46:45, skipping insertion in model container [2018-10-26 22:46:45,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:44" (2/3) ... [2018-10-26 22:46:45,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d267f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:46:45, skipping insertion in model container [2018-10-26 22:46:45,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:46:45" (3/3) ... [2018-10-26 22:46:45,321 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-10-26 22:46:45,330 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:46:45,337 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:46:45,351 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:46:45,376 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:46:45,377 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:46:45,377 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:46:45,377 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:46:45,377 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:46:45,377 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:46:45,377 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:46:45,377 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:46:45,377 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:46:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-10-26 22:46:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:46:45,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:45,402 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:45,405 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:45,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-10-26 22:46:45,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:45,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:45,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:45,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:45,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:45,660 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-10-26 22:46:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:46:45,728 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:45,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:46:45,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:46:45,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:46:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:45,746 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-10-26 22:46:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:45,825 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-10-26 22:46:45,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:46:45,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 22:46:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:45,835 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:46:45,835 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 22:46:45,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 22:46:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-26 22:46:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 22:46:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-10-26 22:46:45,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-10-26 22:46:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:45,873 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-10-26 22:46:45,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:46:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-10-26 22:46:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:46:45,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:45,874 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:45,875 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:45,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-10-26 22:46:45,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:45,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:45,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:45,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:45,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:46:45,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:45,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:46:45,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:46:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:46:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:45,973 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-10-26 22:46:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:46,039 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-10-26 22:46:46,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:46:46,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-26 22:46:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:46,041 INFO L225 Difference]: With dead ends: 44 [2018-10-26 22:46:46,041 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:46:46,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:46:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-10-26 22:46:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 22:46:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-10-26 22:46:46,048 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-10-26 22:46:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:46,049 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-10-26 22:46:46,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:46:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-10-26 22:46:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:46:46,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:46,050 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:46,050 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:46,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-10-26 22:46:46,051 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:46,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:46,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:46,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:46:46,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:46,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-26 22:46:46,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:46:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:46:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:46:46,362 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-10-26 22:46:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:46,411 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-10-26 22:46:46,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:46:46,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-26 22:46:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:46,412 INFO L225 Difference]: With dead ends: 36 [2018-10-26 22:46:46,412 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:46:46,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:46:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:46:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-10-26 22:46:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 22:46:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-10-26 22:46:46,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-10-26 22:46:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:46,418 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-10-26 22:46:46,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:46:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-10-26 22:46:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 22:46:46,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:46,419 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:46,419 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:46,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-10-26 22:46:46,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:46,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:46,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:46,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:46:46,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:46,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:46:46,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:46:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:46:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:46,503 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-10-26 22:46:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:46,597 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-10-26 22:46:46,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:46:46,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-10-26 22:46:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:46,599 INFO L225 Difference]: With dead ends: 48 [2018-10-26 22:46:46,599 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:46:46,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:46:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-10-26 22:46:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-26 22:46:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-10-26 22:46:46,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-10-26 22:46:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:46,603 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-10-26 22:46:46,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:46:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-10-26 22:46:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 22:46:46,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:46,604 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:46,604 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:46,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-10-26 22:46:46,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:46,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:46,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:46,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:46:46,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:46,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:46:46,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:46:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:46:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:46,672 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-10-26 22:46:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:46,715 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-26 22:46:46,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:46:46,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-10-26 22:46:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:46,717 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:46:46,717 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:46:46,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:46:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-10-26 22:46:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-26 22:46:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-10-26 22:46:46,722 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-10-26 22:46:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:46,722 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-10-26 22:46:46,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:46:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-10-26 22:46:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 22:46:46,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:46,723 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:46,724 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:46,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-10-26 22:46:46,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:46,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:46,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:46,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:46:47,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:46:47,210 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 [2018-10-26 22:46:47,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:47,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:46:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:46:47,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:46:47,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 22:46:47,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:46:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:46:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:46:47,321 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2018-10-26 22:46:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:47,446 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2018-10-26 22:46:47,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:46:47,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-10-26 22:46:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:47,447 INFO L225 Difference]: With dead ends: 56 [2018-10-26 22:46:47,447 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 22:46:47,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:46:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 22:46:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-10-26 22:46:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-26 22:46:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-10-26 22:46:47,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-10-26 22:46:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:47,454 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-10-26 22:46:47,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:46:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-10-26 22:46:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:46:47,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:47,456 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:47,456 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:47,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 906172561, now seen corresponding path program 1 times [2018-10-26 22:46:47,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:47,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:47,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:47,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:47,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 22:46:47,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:46:47,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:46:47,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:46:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:46:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:47,575 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-10-26 22:46:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:47,635 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-10-26 22:46:47,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:46:47,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-10-26 22:46:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:47,640 INFO L225 Difference]: With dead ends: 54 [2018-10-26 22:46:47,640 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 22:46:47,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:46:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 22:46:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-26 22:46:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:46:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-10-26 22:46:47,647 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2018-10-26 22:46:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:47,647 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2018-10-26 22:46:47,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:46:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2018-10-26 22:46:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:46:47,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:47,648 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:47,648 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:47,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2018-10-26 22:46:47,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:47,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:47,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:47,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 22:46:47,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:46:47,893 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 [2018-10-26 22:46:47,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:47,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:46:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 22:46:47,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:46:47,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 22:46:47,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:46:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:46:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:46:47,992 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2018-10-26 22:46:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:48,171 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-10-26 22:46:48,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:46:48,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-10-26 22:46:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:48,175 INFO L225 Difference]: With dead ends: 74 [2018-10-26 22:46:48,175 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 22:46:48,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:46:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 22:46:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2018-10-26 22:46:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 22:46:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-10-26 22:46:48,182 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2018-10-26 22:46:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:48,182 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-10-26 22:46:48,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:46:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-10-26 22:46:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 22:46:48,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:48,184 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:48,184 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:48,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2018-10-26 22:46:48,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:48,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:48,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:48,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:46:48,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 22:46:48,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:46:48,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 [2018-10-26 22:46:48,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:46:48,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:46:48,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:46:48,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:46:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 22:46:48,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:46:48,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2018-10-26 22:46:48,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:46:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:46:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:46:48,482 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2018-10-26 22:46:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:48,771 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2018-10-26 22:46:48,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:46:48,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2018-10-26 22:46:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:48,772 INFO L225 Difference]: With dead ends: 78 [2018-10-26 22:46:48,773 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 22:46:48,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:46:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 22:46:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2018-10-26 22:46:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-26 22:46:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-10-26 22:46:48,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2018-10-26 22:46:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:48,780 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-10-26 22:46:48,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:46:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-10-26 22:46:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-26 22:46:48,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:46:48,783 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:46:48,783 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:46:48,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:46:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2018-10-26 22:46:48,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:46:48,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:46:48,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:48,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:46:48,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:46:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:46:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-26 22:46:49,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:46:49,136 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/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 [2018-10-26 22:46:49,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:46:49,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-26 22:46:49,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:46:49,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:46:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-26 22:46:49,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:46:49,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2018-10-26 22:46:49,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:46:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:46:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:46:49,315 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 17 states. [2018-10-26 22:46:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:46:49,421 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2018-10-26 22:46:49,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:46:49,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-26 22:46:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:46:49,422 INFO L225 Difference]: With dead ends: 66 [2018-10-26 22:46:49,422 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:46:49,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:46:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:46:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:46:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:46:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:46:49,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-10-26 22:46:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:46:49,424 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:46:49,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:46:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:46:49,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:46:49,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:46:49,443 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 22:46:49,443 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:46:49,443 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L428 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L428 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 22:46:49,444 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2018-10-26 22:46:49,444 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L428 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L428 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L425 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-10-26 22:46:49,445 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2018-10-26 22:46:49,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:46:49 BoogieIcfgContainer [2018-10-26 22:46:49,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:46:49,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:46:49,451 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:46:49,452 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:46:49,452 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:46:45" (3/4) ... [2018-10-26 22:46:49,455 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 22:46:49,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 22:46:49,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2018-10-26 22:46:49,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 22:46:49,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-10-26 22:46:49,464 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 22:46:49,464 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-26 22:46:49,464 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 22:46:49,503 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e3374ebf-24f6-4efe-aabc-67445c7a3046/bin-2019/uautomizer/witness.graphml [2018-10-26 22:46:49,503 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:46:49,504 INFO L168 Benchmark]: Toolchain (without parser) took 4892.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 955.8 MB in the beginning and 1.0 GB in the end (delta: -92.9 MB). Peak memory consumption was 48.1 MB. Max. memory is 11.5 GB. [2018-10-26 22:46:49,504 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:46:49,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.17 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 945.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:46:49,505 INFO L168 Benchmark]: Boogie Preprocessor took 23.81 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:46:49,505 INFO L168 Benchmark]: RCFGBuilder took 504.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2018-10-26 22:46:49,506 INFO L168 Benchmark]: TraceAbstraction took 4136.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 73.8 MB). Peak memory consumption was 73.8 MB. Max. memory is 11.5 GB. [2018-10-26 22:46:49,506 INFO L168 Benchmark]: Witness Printer took 52.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-10-26 22:46:49,511 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 172.17 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 945.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.81 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 504.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4136.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 73.8 MB). Peak memory consumption was 73.8 MB. Max. memory is 11.5 GB. * Witness Printer took 52.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. SAFE Result, 4.0s OverallTime, 10 OverallIterations, 3 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 301 SDtfs, 36 SDslu, 2074 SDs, 0 SdLazy, 525 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 34 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 441 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 427 ConstructedInterpolants, 0 QuantifiedInterpolants, 42135 SizeOfPredicates, 13 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 121/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...