./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3_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_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/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 128b2219e8f86913777da69c49be5957c6dd8c80 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:26:16,873 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:26:16,874 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:26:16,881 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:26:16,882 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:26:16,883 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:26:16,884 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:26:16,885 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:26:16,886 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:26:16,887 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:26:16,888 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:26:16,888 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:26:16,889 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:26:16,890 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:26:16,891 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:26:16,891 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:26:16,892 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:26:16,893 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:26:16,895 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:26:16,896 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:26:16,897 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:26:16,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:26:16,900 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:26:16,901 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:26:16,901 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:26:16,902 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:26:16,903 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:26:16,904 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:26:16,904 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:26:16,905 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:26:16,905 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:26:16,906 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:26:16,906 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:26:16,906 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:26:16,908 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:26:16,908 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:26:16,908 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 06:26:16,919 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:26:16,919 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:26:16,920 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:26:16,920 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 06:26:16,920 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 06:26:16,920 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 06:26:16,921 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 06:26:16,921 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:26:16,921 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:26:16,921 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:26:16,921 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:26:16,921 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:26:16,922 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:26:16,922 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:26:16,922 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:26:16,922 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:26:16,924 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:26:16,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:26:16,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:26:16,925 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:26:16,925 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 06:26:16,925 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:26:16,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:26:16,925 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_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/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 -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2018-11-10 06:26:16,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:26:16,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:26:16,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:26:16,961 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:26:16,961 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:26:16,962 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-10 06:26:17,007 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/data/7a9a18ae0/bdf3c86bbc1547c2a02ee2f99cfc608a/FLAGcc9211690 [2018-11-10 06:26:17,403 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:26:17,403 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/sv-benchmarks/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-10 06:26:17,407 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/data/7a9a18ae0/bdf3c86bbc1547c2a02ee2f99cfc608a/FLAGcc9211690 [2018-11-10 06:26:17,417 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/data/7a9a18ae0/bdf3c86bbc1547c2a02ee2f99cfc608a [2018-11-10 06:26:17,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:26:17,420 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 06:26:17,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:26:17,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:26:17,423 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:26:17,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8b0baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17, skipping insertion in model container [2018-11-10 06:26:17,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:26:17,444 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:26:17,537 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:26:17,539 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:26:17,548 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:26:17,556 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:26:17,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17 WrapperNode [2018-11-10 06:26:17,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:26:17,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:26:17,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:26:17,557 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:26:17,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... [2018-11-10 06:26:17,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:26:17,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:26:17,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:26:17,574 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:26:17,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:26:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:26:17,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:26:17,658 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 06:26:17,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:26:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 06:26:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 06:26:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 06:26:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:26:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:26:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:26:17,774 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:26:17,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:26:17 BoogieIcfgContainer [2018-11-10 06:26:17,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:26:17,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:26:17,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:26:17,779 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:26:17,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:26:17" (1/3) ... [2018-11-10 06:26:17,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f9f6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:26:17, skipping insertion in model container [2018-11-10 06:26:17,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:26:17" (2/3) ... [2018-11-10 06:26:17,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f9f6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:26:17, skipping insertion in model container [2018-11-10 06:26:17,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:26:17" (3/3) ... [2018-11-10 06:26:17,782 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-10 06:26:17,792 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:26:17,799 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:26:17,815 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:26:17,843 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 06:26:17,844 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:26:17,844 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:26:17,844 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:26:17,844 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:26:17,845 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:26:17,845 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:26:17,845 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:26:17,845 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:26:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-10 06:26:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 06:26:17,865 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:17,866 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:17,868 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:17,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2018-11-10 06:26:17,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:17,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:17,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:17,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:17,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:26:18,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:26:18,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:26:18,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:26:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:26:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:26:18,049 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-11-10 06:26:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:18,092 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-10 06:26:18,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:26:18,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 06:26:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:18,101 INFO L225 Difference]: With dead ends: 33 [2018-11-10 06:26:18,101 INFO L226 Difference]: Without dead ends: 19 [2018-11-10 06:26:18,103 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 [2018-11-10 06:26:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-10 06:26:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-10 06:26:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-10 06:26:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-10 06:26:18,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2018-11-10 06:26:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-10 06:26:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:26:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-10 06:26:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 06:26:18,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:18,132 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:18,132 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:18,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2018-11-10 06:26:18,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:18,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 06:26:18,192 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:26:18,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:26:18,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:26:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:26:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:26:18,195 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2018-11-10 06:26:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:18,223 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2018-11-10 06:26:18,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:26:18,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-10 06:26:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:18,224 INFO L225 Difference]: With dead ends: 31 [2018-11-10 06:26:18,224 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 06:26:18,224 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 [2018-11-10 06:26:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 06:26:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-10 06:26:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 06:26:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-10 06:26:18,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2018-11-10 06:26:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:18,228 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-10 06:26:18,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:26:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-10 06:26:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 06:26:18,229 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:18,229 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:18,229 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:18,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2018-11-10 06:26:18,230 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:18,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:18,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:18,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 06:26:18,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:26:18,348 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:26:18,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:26:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 06:26:18,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:26:18,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 06:26:18,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:26:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:26:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:26:18,437 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-11-10 06:26:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:18,474 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-10 06:26:18,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:26:18,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-10 06:26:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:18,475 INFO L225 Difference]: With dead ends: 27 [2018-11-10 06:26:18,475 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 06:26:18,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:26:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 06:26:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-10 06:26:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 06:26:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-10 06:26:18,478 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-11-10 06:26:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:18,478 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-10 06:26:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:26:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-10 06:26:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 06:26:18,478 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:18,479 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:18,479 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:18,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2018-11-10 06:26:18,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:18,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:18,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:18,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-10 06:26:18,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:26:18,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:26:18,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:26:18,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:26:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:26:18,549 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2018-11-10 06:26:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:18,560 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-11-10 06:26:18,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:26:18,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-10 06:26:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:18,561 INFO L225 Difference]: With dead ends: 29 [2018-11-10 06:26:18,562 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 06:26:18,562 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 [2018-11-10 06:26:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 06:26:18,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-10 06:26:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 06:26:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-10 06:26:18,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 27 [2018-11-10 06:26:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:18,566 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-10 06:26:18,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:26:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-10 06:26:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 06:26:18,567 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:18,567 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:18,567 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:18,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2018-11-10 06:26:18,568 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:18,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:18,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:26:18,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 06:26:18,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:26:18,685 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:26:18,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 06:26:18,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:26:18,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:26:18,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:26:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 06:26:18,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:26:18,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 06:26:18,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:26:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:26:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:26:18,784 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2018-11-10 06:26:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:18,863 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-11-10 06:26:18,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:26:18,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-11-10 06:26:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:18,864 INFO L225 Difference]: With dead ends: 41 [2018-11-10 06:26:18,864 INFO L226 Difference]: Without dead ends: 29 [2018-11-10 06:26:18,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:26:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-10 06:26:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-10 06:26:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 06:26:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-10 06:26:18,867 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2018-11-10 06:26:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:18,867 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-10 06:26:18,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:26:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-10 06:26:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-10 06:26:18,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:26:18,868 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:26:18,869 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:26:18,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:26:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2018-11-10 06:26:18,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:26:18,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:26:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:26:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:26:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:26:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 06:26:19,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:26:19,021 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:26:19,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:26:19,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 06:26:19,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:26:19,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:26:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 06:26:19,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 06:26:19,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2018-11-10 06:26:19,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:26:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:26:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:26:19,101 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2018-11-10 06:26:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:26:19,178 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-11-10 06:26:19,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:26:19,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-11-10 06:26:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:26:19,179 INFO L225 Difference]: With dead ends: 33 [2018-11-10 06:26:19,179 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 06:26:19,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:26:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 06:26:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 06:26:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 06:26:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 06:26:19,181 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-11-10 06:26:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:26:19,181 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 06:26:19,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:26:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 06:26:19,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 06:26:19,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 06:26:19,202 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 06:26:19,202 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 06:26:19,202 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 06:26:19,203 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 06:26:19,203 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-11-10 06:26:19,203 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-10 06:26:19,203 INFO L428 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L428 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-10 06:26:19,204 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-10 06:26:19,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:26:19 BoogieIcfgContainer [2018-11-10 06:26:19,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:26:19,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:26:19,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:26:19,208 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:26:19,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:26:17" (3/4) ... [2018-11-10 06:26:19,211 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 06:26:19,216 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 06:26:19,216 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 06:26:19,217 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-10 06:26:19,220 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 06:26:19,220 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 06:26:19,220 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 06:26:19,250 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7d2c5fca-4383-4e3a-9d0f-fb850e4f9998/bin-2019/uautomizer/witness.graphml [2018-11-10 06:26:19,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:26:19,251 INFO L168 Benchmark]: Toolchain (without parser) took 1831.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 959.3 MB in the beginning and 959.8 MB in the end (delta: -552.2 kB). Peak memory consumption was 137.9 MB. Max. memory is 11.5 GB. [2018-11-10 06:26:19,252 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:26:19,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 06:26:19,253 INFO L168 Benchmark]: Boogie Preprocessor took 17.22 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:26:19,253 INFO L168 Benchmark]: RCFGBuilder took 201.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 06:26:19,253 INFO L168 Benchmark]: TraceAbstraction took 1430.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 962.5 MB in the end (delta: 166.5 MB). Peak memory consumption was 166.5 MB. Max. memory is 11.5 GB. [2018-11-10 06:26:19,254 INFO L168 Benchmark]: Witness Printer took 43.29 ms. Allocated memory is still 1.2 GB. Free memory was 962.5 MB in the beginning and 959.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:26:19,256 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 136.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.22 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 201.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1430.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 962.5 MB in the end (delta: 166.5 MB). Peak memory consumption was 166.5 MB. Max. memory is 11.5 GB. * Witness Printer took 43.29 ms. Allocated memory is still 1.2 GB. Free memory was 962.5 MB in the beginning and 959.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 16 SDslu, 573 SDs, 0 SdLazy, 177 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 222 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15273 SizeOfPredicates, 7 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 91/123 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...