./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/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 7408fe5ba42f5c474832c90e26f3e7ef2342554c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:51:32,017 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:51:32,019 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:51:32,034 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:51:32,035 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:51:32,035 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:51:32,036 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:51:32,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:51:32,039 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:51:32,040 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:51:32,041 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:51:32,041 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:51:32,042 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:51:32,043 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:51:32,044 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:51:32,044 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:51:32,046 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:51:32,047 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:51:32,048 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:51:32,050 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:51:32,051 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:51:32,052 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:51:32,054 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:51:32,054 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:51:32,054 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:51:32,055 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:51:32,056 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:51:32,056 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:51:32,057 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:51:32,058 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:51:32,058 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:51:32,059 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:51:32,059 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:51:32,059 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:51:32,060 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:51:32,061 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:51:32,061 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 10:51:32,072 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:51:32,072 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:51:32,073 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:51:32,073 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 10:51:32,074 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:51:32,074 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:51:32,074 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:51:32,074 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:51:32,074 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:51:32,074 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:51:32,075 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:51:32,076 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:51:32,076 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:51:32,077 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:51:32,077 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:51:32,079 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:51:32,079 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:51:32,079 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:51:32,079 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:51:32,079 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_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/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 -> 7408fe5ba42f5c474832c90e26f3e7ef2342554c [2018-11-18 10:51:32,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:51:32,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:51:32,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:51:32,121 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:51:32,122 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:51:32,122 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i [2018-11-18 10:51:32,171 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/data/f0b4d2884/769fbb513c8143d08026389559685d9d/FLAG80b116f10 [2018-11-18 10:51:32,545 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:51:32,546 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/sv-benchmarks/c/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i [2018-11-18 10:51:32,551 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/data/f0b4d2884/769fbb513c8143d08026389559685d9d/FLAG80b116f10 [2018-11-18 10:51:32,561 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/data/f0b4d2884/769fbb513c8143d08026389559685d9d [2018-11-18 10:51:32,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:51:32,565 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 10:51:32,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:51:32,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:51:32,568 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:51:32,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63216a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32, skipping insertion in model container [2018-11-18 10:51:32,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:51:32,593 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:51:32,717 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:51:32,719 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:51:32,731 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:51:32,740 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:51:32,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32 WrapperNode [2018-11-18 10:51:32,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:51:32,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:51:32,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:51:32,741 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:51:32,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... [2018-11-18 10:51:32,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:51:32,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:51:32,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:51:32,760 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:51:32,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:51:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:51:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:51:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 10:51:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:51:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:51:32,945 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:51:32,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:51:32 BoogieIcfgContainer [2018-11-18 10:51:32,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:51:32,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:51:32,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:51:32,949 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:51:32,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:51:32" (1/3) ... [2018-11-18 10:51:32,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b203230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:51:32, skipping insertion in model container [2018-11-18 10:51:32,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:51:32" (2/3) ... [2018-11-18 10:51:32,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b203230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:51:32, skipping insertion in model container [2018-11-18 10:51:32,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:51:32" (3/3) ... [2018-11-18 10:51:32,952 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005b_true-unreach-call_true-termination.c.i [2018-11-18 10:51:32,959 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:51:32,965 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:51:32,977 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:51:33,000 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:51:33,001 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:51:33,001 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:51:33,001 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:51:33,001 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:51:33,001 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:51:33,002 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:51:33,002 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:51:33,002 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:51:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 10:51:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 10:51:33,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,020 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,022 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -557638975, now seen corresponding path program 1 times [2018-11-18 10:51:33,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:51:33,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:51:33,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:51:33,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 10:51:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 10:51:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 10:51:33,119 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-11-18 10:51:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,134 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2018-11-18 10:51:33,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 10:51:33,135 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 10:51:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,140 INFO L225 Difference]: With dead ends: 43 [2018-11-18 10:51:33,140 INFO L226 Difference]: Without dead ends: 17 [2018-11-18 10:51:33,142 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 10:51:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-18 10:51:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-18 10:51:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 10:51:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-11-18 10:51:33,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2018-11-18 10:51:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,171 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-11-18 10:51:33,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 10:51:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-11-18 10:51:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 10:51:33,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,172 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,172 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1155614924, now seen corresponding path program 1 times [2018-11-18 10:51:33,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:51:33,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:51:33,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 10:51:33,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:51:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:51:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:51:33,209 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2018-11-18 10:51:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,223 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-11-18 10:51:33,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:51:33,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 10:51:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,224 INFO L225 Difference]: With dead ends: 24 [2018-11-18 10:51:33,224 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 10:51:33,225 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:51:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 10:51:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 10:51:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 10:51:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-18 10:51:33,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2018-11-18 10:51:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,229 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-18 10:51:33,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:51:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-18 10:51:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 10:51:33,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,230 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,230 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -220474704, now seen corresponding path program 1 times [2018-11-18 10:51:33,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:51:33,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:51:33,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 10:51:33,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:51:33,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:51:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:51:33,270 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2018-11-18 10:51:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,280 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-18 10:51:33,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:51:33,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-18 10:51:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,280 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:51:33,281 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 10:51:33,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:51:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 10:51:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 10:51:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 10:51:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-18 10:51:33,284 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2018-11-18 10:51:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,285 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-18 10:51:33,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:51:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-18 10:51:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:51:33,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,285 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,286 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 260416874, now seen corresponding path program 1 times [2018-11-18 10:51:33,286 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:51:33,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:51:33,314 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:51:33,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:51:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:51:33,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:51:33,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-18 10:51:33,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 10:51:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 10:51:33,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 10:51:33,387 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2018-11-18 10:51:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,409 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-18 10:51:33,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 10:51:33,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-11-18 10:51:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,411 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:51:33,411 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 10:51:33,411 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 10:51:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 10:51:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 10:51:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 10:51:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-11-18 10:51:33,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2018-11-18 10:51:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,414 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-11-18 10:51:33,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 10:51:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-11-18 10:51:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:51:33,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,415 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,415 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1089248186, now seen corresponding path program 2 times [2018-11-18 10:51:33,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:51:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:51:33,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:51:33,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:51:33,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:51:33,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:51:33,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:51:33,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:51:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:51:33,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:51:33,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-11-18 10:51:33,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:51:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:51:33,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:51:33,598 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2018-11-18 10:51:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,654 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2018-11-18 10:51:33,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 10:51:33,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-18 10:51:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,655 INFO L225 Difference]: With dead ends: 47 [2018-11-18 10:51:33,655 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 10:51:33,655 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:51:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 10:51:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 10:51:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:51:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 10:51:33,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2018-11-18 10:51:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,660 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 10:51:33,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:51:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 10:51:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 10:51:33,661 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:51:33,661 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:51:33,661 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:51:33,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:51:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash 244005440, now seen corresponding path program 3 times [2018-11-18 10:51:33,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:51:33,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:51:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:51:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:51:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:51:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:51:33,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:51:33,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:51:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:51:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:51:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:51:33,708 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-11-18 10:51:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:51:33,746 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-18 10:51:33,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:51:33,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-11-18 10:51:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:51:33,747 INFO L225 Difference]: With dead ends: 44 [2018-11-18 10:51:33,747 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:51:33,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:51:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:51:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:51:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:51:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:51:33,748 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-11-18 10:51:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:51:33,748 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:51:33,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:51:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:51:33,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:51:33,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:51:33,832 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:51:33,832 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:51:33,833 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 27) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 23) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L421 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (= main_~k~0 4) [2018-11-18 10:51:33,833 INFO L421 ceAbstractionStarter]: At program point L21-4(lines 15 24) the Hoare annotation is: (or (= main_~k~0 4) (and (<= (+ main_~j~0 100) main_~i~0) (<= main_~i~0 0))) [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 19) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 24) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L421 ceAbstractionStarter]: At program point L17-3(lines 17 19) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point L17-4(lines 17 19) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 27) no Hoare annotation was computed. [2018-11-18 10:51:33,833 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 24) the Hoare annotation is: (= main_~k~0 4) [2018-11-18 10:51:33,833 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 27) the Hoare annotation is: true [2018-11-18 10:51:33,834 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 10:51:33,834 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 10:51:33,834 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 10:51:33,834 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 10:51:33,834 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 10:51:33,834 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 10:51:33,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:51:33 BoogieIcfgContainer [2018-11-18 10:51:33,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:51:33,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:51:33,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:51:33,844 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:51:33,844 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:51:32" (3/4) ... [2018-11-18 10:51:33,846 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:51:33,850 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:51:33,851 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:51:33,851 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 10:51:33,853 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-18 10:51:33,853 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 10:51:33,853 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:51:33,880 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7d6c29df-e5dd-4bf3-81f4-7f9be4b7b30f/bin-2019/uautomizer/witness.graphml [2018-11-18 10:51:33,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:51:33,880 INFO L168 Benchmark]: Toolchain (without parser) took 1316.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 958.5 MB in the beginning and 1.1 GB in the end (delta: -94.7 MB). Peak memory consumption was 71.0 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,881 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:51:33,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.55 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,882 INFO L168 Benchmark]: Boogie Preprocessor took 19.18 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,883 INFO L168 Benchmark]: RCFGBuilder took 186.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -207.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,883 INFO L168 Benchmark]: TraceAbstraction took 896.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 96.0 MB). Peak memory consumption was 96.0 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,884 INFO L168 Benchmark]: Witness Printer took 36.41 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: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2018-11-18 10:51:33,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.55 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.18 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 186.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -207.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 896.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 96.0 MB). Peak memory consumption was 96.0 MB. Max. memory is 11.5 GB. * Witness Printer took 36.41 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: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: k == 4 || (j + 100 <= i && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 9 SDslu, 156 SDs, 0 SdLazy, 34 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 15 PreInvPairs, 25 NumberOfFragments, 31 HoareAnnotationTreeSize, 15 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 6480 SizeOfPredicates, 3 NumberOfNonLiveVariables, 92 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 51/61 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...