./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1225f82562543767c482452e9133e4a69d5dae70 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:55:26,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:55:26,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:55:26,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:55:26,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:55:26,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:55:26,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:55:26,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:55:26,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:55:26,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:55:26,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:55:26,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:55:26,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:55:26,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:55:26,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:55:26,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:55:26,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:55:26,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:55:26,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:55:26,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:55:26,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:55:26,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:55:26,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:55:26,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:55:26,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:55:26,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:55:26,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:55:26,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:55:26,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:55:26,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:55:26,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:55:26,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:55:26,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:55:26,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:55:26,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:55:26,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:55:26,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:55:26,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:55:26,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:55:26,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:55:26,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:55:26,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:55:26,243 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:55:26,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:55:26,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:55:26,244 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:55:26,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:55:26,244 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:55:26,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:55:26,245 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:55:26,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:55:26,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:55:26,245 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:55:26,246 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:55:26,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:55:26,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:55:26,246 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:55:26,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:55:26,247 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:55:26,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:55:26,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:55:26,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:55:26,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:55:26,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:55:26,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:55:26,249 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:55:26,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:55:26,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:55:26,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:55:26,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:55:26,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:55:26,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:55:26,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:55:26,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:55:26,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:55:26,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:55:26,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:55:26,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:55:26,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:55:26,252 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan 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 -> Taipan 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 -> 1225f82562543767c482452e9133e4a69d5dae70 [2019-11-26 02:55:26,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:55:26,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:55:26,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:55:26,397 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:55:26,397 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:55:26,398 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2019-11-26 02:55:26,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/data/ea9862edf/d4d0f0a6b3a642329312ad3b037e6cd6/FLAG9906a49c8 [2019-11-26 02:55:26,843 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:55:26,843 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/sv-benchmarks/c/ldv-regression/stateful_check.c [2019-11-26 02:55:26,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/data/ea9862edf/d4d0f0a6b3a642329312ad3b037e6cd6/FLAG9906a49c8 [2019-11-26 02:55:26,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/data/ea9862edf/d4d0f0a6b3a642329312ad3b037e6cd6 [2019-11-26 02:55:26,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:55:26,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:55:26,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:26,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:55:26,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:55:26,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:26" (1/1) ... [2019-11-26 02:55:26,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e292ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:26, skipping insertion in model container [2019-11-26 02:55:26,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:26" (1/1) ... [2019-11-26 02:55:26,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:55:26,910 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:55:27,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:27,051 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:55:27,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:27,152 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:55:27,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27 WrapperNode [2019-11-26 02:55:27,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:27,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:27,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:55:27,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:55:27,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:27,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:55:27,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:55:27,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:55:27,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... [2019-11-26 02:55:27,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:55:27,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:55:27,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:55:27,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:55:27,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/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 [2019-11-26 02:55:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:55:27,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:55:27,764 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:55:27,765 INFO L284 CfgBuilder]: Removed 35 assume(true) statements. [2019-11-26 02:55:27,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:27 BoogieIcfgContainer [2019-11-26 02:55:27,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:55:27,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:55:27,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:55:27,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:55:27,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:55:26" (1/3) ... [2019-11-26 02:55:27,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192292b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:27, skipping insertion in model container [2019-11-26 02:55:27,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:27" (2/3) ... [2019-11-26 02:55:27,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192292b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:27, skipping insertion in model container [2019-11-26 02:55:27,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:27" (3/3) ... [2019-11-26 02:55:27,773 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2019-11-26 02:55:27,781 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:55:27,787 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-26 02:55:27,795 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-26 02:55:27,813 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:55:27,813 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:55:27,813 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:55:27,814 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:55:27,815 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:55:27,815 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:55:27,815 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:55:27,815 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:55:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-26 02:55:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:55:27,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:27,834 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:55:27,835 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:27,840 INFO L82 PathProgramCache]: Analyzing trace with hash 5646577, now seen corresponding path program 1 times [2019-11-26 02:55:27,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:27,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237731059] [2019-11-26 02:55:27,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:27,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237731059] [2019-11-26 02:55:27,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:27,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:55:27,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144961435] [2019-11-26 02:55:27,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:55:27,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:55:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:55:27,959 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-26 02:55:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:27,975 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2019-11-26 02:55:27,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:55:27,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-11-26 02:55:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:27,984 INFO L225 Difference]: With dead ends: 63 [2019-11-26 02:55:27,984 INFO L226 Difference]: Without dead ends: 30 [2019-11-26 02:55:27,986 INFO L630 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 [2019-11-26 02:55:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-26 02:55:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-26 02:55:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-26 02:55:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-26 02:55:28,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 4 [2019-11-26 02:55:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:28,015 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-26 02:55:28,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:55:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-26 02:55:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:55:28,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:28,016 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:55:28,017 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 171135582, now seen corresponding path program 1 times [2019-11-26 02:55:28,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:28,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188660699] [2019-11-26 02:55:28,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:28,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188660699] [2019-11-26 02:55:28,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:28,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:55:28,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269567681] [2019-11-26 02:55:28,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:28,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:28,047 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2019-11-26 02:55:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:28,106 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2019-11-26 02:55:28,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:28,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-26 02:55:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:28,109 INFO L225 Difference]: With dead ends: 49 [2019-11-26 02:55:28,109 INFO L226 Difference]: Without dead ends: 42 [2019-11-26 02:55:28,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-26 02:55:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-26 02:55:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-26 02:55:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2019-11-26 02:55:28,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 5 [2019-11-26 02:55:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:28,123 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2019-11-26 02:55:28,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2019-11-26 02:55:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:55:28,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:28,125 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:28,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -192050693, now seen corresponding path program 1 times [2019-11-26 02:55:28,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:28,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548896913] [2019-11-26 02:55:28,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:28,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548896913] [2019-11-26 02:55:28,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:28,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:55:28,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958602349] [2019-11-26 02:55:28,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:28,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:28,161 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 3 states. [2019-11-26 02:55:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:28,199 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2019-11-26 02:55:28,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:28,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-26 02:55:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:28,201 INFO L225 Difference]: With dead ends: 102 [2019-11-26 02:55:28,202 INFO L226 Difference]: Without dead ends: 61 [2019-11-26 02:55:28,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-26 02:55:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-26 02:55:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-26 02:55:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2019-11-26 02:55:28,212 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 13 [2019-11-26 02:55:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:28,213 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2019-11-26 02:55:28,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2019-11-26 02:55:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:55:28,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:28,214 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:28,214 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash -857630274, now seen corresponding path program 1 times [2019-11-26 02:55:28,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:28,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039421663] [2019-11-26 02:55:28,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:28,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039421663] [2019-11-26 02:55:28,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231859250] [2019-11-26 02:55:28,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:55:28,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:55:28,358 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:55:28,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-26 02:55:28,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-26 02:55:28,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254218195] [2019-11-26 02:55:28,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:28,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:28,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:28,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:55:28,363 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand 3 states. [2019-11-26 02:55:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:28,387 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2019-11-26 02:55:28,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:28,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-26 02:55:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:28,389 INFO L225 Difference]: With dead ends: 85 [2019-11-26 02:55:28,389 INFO L226 Difference]: Without dead ends: 28 [2019-11-26 02:55:28,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:55:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-26 02:55:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-26 02:55:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-26 02:55:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-11-26 02:55:28,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 17 [2019-11-26 02:55:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:28,404 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-11-26 02:55:28,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-11-26 02:55:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:55:28,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:28,405 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:28,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:28,616 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash -831864039, now seen corresponding path program 1 times [2019-11-26 02:55:28,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:28,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85675368] [2019-11-26 02:55:28,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:28,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85675368] [2019-11-26 02:55:28,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558414103] [2019-11-26 02:55:28,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:28,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:55:28,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:28,750 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:28,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:55:28,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:55:28,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 5 [2019-11-26 02:55:28,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017734051] [2019-11-26 02:55:28,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:28,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:55:28,777 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 3 states. [2019-11-26 02:55:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:28,805 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2019-11-26 02:55:28,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:28,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-26 02:55:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:28,807 INFO L225 Difference]: With dead ends: 71 [2019-11-26 02:55:28,807 INFO L226 Difference]: Without dead ends: 44 [2019-11-26 02:55:28,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:55:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-26 02:55:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-26 02:55:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:55:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-26 02:55:28,814 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 17 [2019-11-26 02:55:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:28,815 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-26 02:55:28,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2019-11-26 02:55:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-26 02:55:28,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:28,816 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:29,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:29,026 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash 160250382, now seen corresponding path program 1 times [2019-11-26 02:55:29,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:29,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423372529] [2019-11-26 02:55:29,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:55:29,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423372529] [2019-11-26 02:55:29,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108908160] [2019-11-26 02:55:29,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:29,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:55:29,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:29,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:29,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:55:29,225 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:29,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:29,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:55:29,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932318474] [2019-11-26 02:55:29,292 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:55:29,293 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:55:29,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:55:29,316 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:55:29,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:55:29,704 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:55:30,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:55:30,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2019-11-26 02:55:30,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430510267] [2019-11-26 02:55:30,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:55:30,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:55:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:55:30,398 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand 10 states. [2019-11-26 02:55:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:30,738 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2019-11-26 02:55:30,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:55:30,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-26 02:55:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:30,740 INFO L225 Difference]: With dead ends: 127 [2019-11-26 02:55:30,740 INFO L226 Difference]: Without dead ends: 84 [2019-11-26 02:55:30,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:55:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-26 02:55:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2019-11-26 02:55:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-26 02:55:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2019-11-26 02:55:30,759 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 23 [2019-11-26 02:55:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:30,759 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2019-11-26 02:55:30,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:55:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2019-11-26 02:55:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-26 02:55:30,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:30,762 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:30,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:30,965 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1166583923, now seen corresponding path program 1 times [2019-11-26 02:55:30,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:30,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196499820] [2019-11-26 02:55:30,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-26 02:55:31,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196499820] [2019-11-26 02:55:31,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758680442] [2019-11-26 02:55:31,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:31,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:55:31,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-26 02:55:31,159 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:55:31,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166314743] [2019-11-26 02:55:31,241 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:55:31,241 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:55:31,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:55:31,241 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:55:31,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:55:31,616 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:55:32,443 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:55:32,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:55:32,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 7] total 11 [2019-11-26 02:55:32,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264836013] [2019-11-26 02:55:32,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:55:32,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:55:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:55:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:55:32,445 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 12 states. [2019-11-26 02:55:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:32,617 INFO L93 Difference]: Finished difference Result 147 states and 211 transitions. [2019-11-26 02:55:32,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:55:32,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-26 02:55:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:32,619 INFO L225 Difference]: With dead ends: 147 [2019-11-26 02:55:32,619 INFO L226 Difference]: Without dead ends: 104 [2019-11-26 02:55:32,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2019-11-26 02:55:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-26 02:55:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2019-11-26 02:55:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:55:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-26 02:55:32,633 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 28 [2019-11-26 02:55:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:32,633 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-26 02:55:32,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:55:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2019-11-26 02:55:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-26 02:55:32,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:32,636 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:32,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:32,847 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1653530125, now seen corresponding path program 2 times [2019-11-26 02:55:32,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:55:32,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555691868] [2019-11-26 02:55:32,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:55:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:32,885 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:55:32,885 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:55:32,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:55:32 BoogieIcfgContainer [2019-11-26 02:55:32,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:55:32,932 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:55:32,932 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:55:32,932 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:55:32,933 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:27" (3/4) ... [2019-11-26 02:55:32,936 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:55:33,006 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_605d0e9b-710c-4777-b517-64e4be91c1e2/bin/utaipan/witness.graphml [2019-11-26 02:55:33,006 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:55:33,008 INFO L168 Benchmark]: Toolchain (without parser) took 6134.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.2 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -169.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:33,008 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:33,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:33,009 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:33,009 INFO L168 Benchmark]: Boogie Preprocessor took 37.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:33,009 INFO L168 Benchmark]: RCFGBuilder took 529.42 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: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:33,010 INFO L168 Benchmark]: TraceAbstraction took 5164.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 770.7 kB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:33,010 INFO L168 Benchmark]: Witness Printer took 74.15 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: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:33,012 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 529.42 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: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5164.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 770.7 kB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. * Witness Printer took 74.15 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: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L69] open_called = 0 [L70] return 0; [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L83] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L52] return 0; [L91] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L48] return 0; [L99] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: VAL [ldv_mutex=1, open_called=0] [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L34] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L17] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L4] __VERIFIER_error() VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 5 error locations. Result: UNSAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 88 SDslu, 163 SDs, 0 SdLazy, 235 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 181 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 71 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 220 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 15291 SizeOfPredicates, 43 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 44/129 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 412, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 29, TOOLS_POST_TIME[ms]: 39, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME[ms]: 31, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 5, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 44, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 9, DOMAIN_JOIN_TIME[ms]: 256, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 18, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 2, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME[ms]: 24, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 113, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 112, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 18, DAG_COMPRESSION_PROCESSED_NODES: 375, DAG_COMPRESSION_RETAINED_NODES: 48, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...