./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-cad4683 [2019-10-22 11:25:29,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:29,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:29,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:29,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:29,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:29,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:29,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:29,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:29,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:29,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:29,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:29,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:29,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:29,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:29,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:29,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:29,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:29,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:29,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:29,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:29,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:29,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:29,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:29,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:29,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:29,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:29,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:29,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:29,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:29,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:29,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:29,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:29,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:29,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:29,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:29,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:29,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:29,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:29,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:29,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:29,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:29,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:29,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:29,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:29,457 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:29,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:29,457 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:29,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:29,457 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:29,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:29,458 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:29,458 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:29,458 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:29,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:29,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:29,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:29,460 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:29,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:29,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:29,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:29,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:29,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:29,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:29,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:29,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:29,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:29,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:29,462 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:29,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:29,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:29,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:29,463 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/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 -> d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 [2019-10-22 11:25:29,485 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:29,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:29,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:29,498 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:29,499 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:29,499 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o20.c [2019-10-22 11:25:29,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/0743641bd/96a6add7570c4d19b375812bd52f4b6c/FLAG4aef66f77 [2019-10-22 11:25:29,875 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:29,876 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/sv-benchmarks/c/recursive-simple/id_o20.c [2019-10-22 11:25:29,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/0743641bd/96a6add7570c4d19b375812bd52f4b6c/FLAG4aef66f77 [2019-10-22 11:25:29,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/0743641bd/96a6add7570c4d19b375812bd52f4b6c [2019-10-22 11:25:29,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:29,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:29,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:29,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:29,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:29,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:29" (1/1) ... [2019-10-22 11:25:29,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6037e7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:29, skipping insertion in model container [2019-10-22 11:25:29,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:29" (1/1) ... [2019-10-22 11:25:29,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:29,923 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:30,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:30,042 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:30,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:30,122 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:30,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30 WrapperNode [2019-10-22 11:25:30,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:30,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:30,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:30,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:30,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:30,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:30,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:30,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:30,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... [2019-10-22 11:25:30,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:30,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:30,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:30,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:30,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 [2019-10-22 11:25:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:30,392 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:30,393 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:30,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:30 BoogieIcfgContainer [2019-10-22 11:25:30,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:30,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:30,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:30,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:29" (1/3) ... [2019-10-22 11:25:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627c66d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:30, skipping insertion in model container [2019-10-22 11:25:30,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:30" (2/3) ... [2019-10-22 11:25:30,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627c66d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:30, skipping insertion in model container [2019-10-22 11:25:30,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:30" (3/3) ... [2019-10-22 11:25:30,408 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2019-10-22 11:25:30,419 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:30,427 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:30,441 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:30,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:30,467 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:30,467 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:30,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:30,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:30,467 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:30,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:30,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 11:25:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:30,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:30,491 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:30,493 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 11:25:30,507 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:30,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783939842] [2019-10-22 11:25:30,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:30,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:30,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:30,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783939842] [2019-10-22 11:25:30,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:30,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:25:30,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421337642] [2019-10-22 11:25:30,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:25:30,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:25:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:25:30,764 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-10-22 11:25:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:30,848 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-22 11:25:30,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:30,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 11:25:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:30,859 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:25:30,860 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 11:25:30,863 INFO L600 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 [2019-10-22 11:25:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 11:25:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 11:25:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 11:25:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 11:25:30,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 11:25:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:30,943 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 11:25:30,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:25:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 11:25:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:30,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:30,944 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:30,945 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 11:25:30,945 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:30,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543069880] [2019-10-22 11:25:30,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:30,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:30,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:31,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543069880] [2019-10-22 11:25:31,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56609916] [2019-10-22 11:25:31,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 [2019-10-22 11:25:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:31,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:25:31,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:31,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:31,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [492318541] [2019-10-22 11:25:31,362 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 16 [2019-10-22 11:25:31,401 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:31,401 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:31,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:31,667 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:25:31,672 INFO L168 Benchmark]: Toolchain (without parser) took 1776.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -104.2 MB). Peak memory consumption was 38.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:31,673 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:31,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:31,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.51 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:31,679 INFO L168 Benchmark]: Boogie Preprocessor took 16.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:31,680 INFO L168 Benchmark]: RCFGBuilder took 229.23 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:31,680 INFO L168 Benchmark]: TraceAbstraction took 1272.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:31,684 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 227.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.51 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 229.23 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1272.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:33,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:33,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:33,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:33,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:33,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:33,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:33,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:33,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:33,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:33,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:33,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:33,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:33,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:33,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:33,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:33,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:33,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:33,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:33,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:33,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:33,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:33,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:33,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:33,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:33,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:33,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:33,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:33,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:33,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:33,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:33,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:33,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:33,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:33,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:33,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:33,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:33,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:33,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:33,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:33,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:33,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:33,972 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:33,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:33,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:33,982 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:33,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:33,983 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:33,983 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:33,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:33,983 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:33,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:33,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:33,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:33,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:33,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:33,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:33,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:33,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:33,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:33,986 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:33,987 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:33,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:33,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:33,987 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 -> d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 [2019-10-22 11:25:34,029 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:34,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:34,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:34,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:34,049 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:34,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o20.c [2019-10-22 11:25:34,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/79b3f8a53/ea94785559ae4965a60a8adba092ac95/FLAG2b0854183 [2019-10-22 11:25:34,491 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:34,491 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/sv-benchmarks/c/recursive-simple/id_o20.c [2019-10-22 11:25:34,498 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/79b3f8a53/ea94785559ae4965a60a8adba092ac95/FLAG2b0854183 [2019-10-22 11:25:34,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/data/79b3f8a53/ea94785559ae4965a60a8adba092ac95 [2019-10-22 11:25:34,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:34,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:34,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:34,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:34,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:34,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:34" (1/1) ... [2019-10-22 11:25:34,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f513c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:34, skipping insertion in model container [2019-10-22 11:25:34,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:34" (1/1) ... [2019-10-22 11:25:34,871 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:34,885 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:35,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:35,038 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:35,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:35,072 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:35,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35 WrapperNode [2019-10-22 11:25:35,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:35,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:35,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:35,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:35,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:35,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:35,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:35,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:35,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:35,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:35,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:35,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:35,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 [2019-10-22 11:25:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:35,246 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:35,393 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:35,394 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:35,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:35 BoogieIcfgContainer [2019-10-22 11:25:35,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:35,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:35,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:35,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:35,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:34" (1/3) ... [2019-10-22 11:25:35,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202950aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:35, skipping insertion in model container [2019-10-22 11:25:35,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (2/3) ... [2019-10-22 11:25:35,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202950aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:35, skipping insertion in model container [2019-10-22 11:25:35,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:35" (3/3) ... [2019-10-22 11:25:35,404 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2019-10-22 11:25:35,414 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:35,422 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:35,434 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:35,459 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:35,459 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:35,459 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:35,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:35,460 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:35,460 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:35,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:35,460 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 11:25:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:35,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:35,489 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:35,491 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 11:25:35,508 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:35,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1501725456] [2019-10-22 11:25:35,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:35,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:35,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:35,681 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:35,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501725456] [2019-10-22 11:25:35,785 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:35,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:25:35,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472815782] [2019-10-22 11:25:35,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:25:35,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:35,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:25:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:35,806 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 8 states. [2019-10-22 11:25:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:35,867 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-22 11:25:35,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:25:35,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 11:25:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:35,879 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:25:35,880 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 11:25:35,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 11:25:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 11:25:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 11:25:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 11:25:35,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 11:25:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:35,925 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 11:25:35,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:25:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 11:25:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:35,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:35,927 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:36,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:36,128 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 11:25:36,129 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:36,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1440042277] [2019-10-22 11:25:36,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:36,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:36,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:36,224 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:36,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440042277] [2019-10-22 11:25:36,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140955538] [2019-10-22 11:25:36,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/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 [2019-10-22 11:25:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:36,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:36,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:36,451 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:36,554 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:36,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2019-10-22 11:25:36,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268538338] [2019-10-22 11:25:36,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 11:25:36,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 11:25:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:36,560 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states. [2019-10-22 11:25:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:36,609 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-10-22 11:25:36,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 11:25:36,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-10-22 11:25:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:36,611 INFO L225 Difference]: With dead ends: 26 [2019-10-22 11:25:36,611 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:25:36,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:25:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:25:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 11:25:36,619 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2019-10-22 11:25:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:36,620 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 11:25:36,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 11:25:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 11:25:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 11:25:36,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:36,622 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:37,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:37,023 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:37,023 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 2 times [2019-10-22 11:25:37,024 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:37,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1346877628] [2019-10-22 11:25:37,024 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:37,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:37,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:37,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:37,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:37,209 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:37,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1346877628] [2019-10-22 11:25:37,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170594882] [2019-10-22 11:25:37,701 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:37,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:37,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:37,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:37,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:37,750 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:37,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:37,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 20 [2019-10-22 11:25:37,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270713553] [2019-10-22 11:25:37,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 11:25:37,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 11:25:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2019-10-22 11:25:37,958 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 20 states. [2019-10-22 11:25:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:38,139 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-22 11:25:38,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 11:25:38,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-22 11:25:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:38,141 INFO L225 Difference]: With dead ends: 38 [2019-10-22 11:25:38,142 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:25:38,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-10-22 11:25:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:25:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:25:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:25:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 11:25:38,149 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2019-10-22 11:25:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:38,150 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 11:25:38,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 11:25:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 11:25:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 11:25:38,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:38,152 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:38,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:38,553 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 3 times [2019-10-22 11:25:38,554 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:38,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [773566950] [2019-10-22 11:25:38,554 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:38,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 11:25:38,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:38,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 11:25:38,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:25:38,920 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:25:39,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773566950] [2019-10-22 11:25:39,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410431212] [2019-10-22 11:25:39,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:39,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 11:25:39,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:39,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 11:25:39,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:25:39,947 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:25:40,511 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:40,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19] total 36 [2019-10-22 11:25:40,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564628920] [2019-10-22 11:25:40,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-22 11:25:40,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-22 11:25:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 11:25:40,514 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 36 states. [2019-10-22 11:25:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:41,088 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-10-22 11:25:41,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-22 11:25:41,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-10-22 11:25:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:41,090 INFO L225 Difference]: With dead ends: 62 [2019-10-22 11:25:41,090 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 11:25:41,091 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2019-10-22 11:25:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 11:25:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 11:25:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 11:25:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-22 11:25:41,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2019-10-22 11:25:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:41,102 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-22 11:25:41,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-22 11:25:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-22 11:25:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-22 11:25:41,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:41,105 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:41,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:41,506 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 4 times [2019-10-22 11:25:41,506 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:41,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [574652615] [2019-10-22 11:25:41,507 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:41,588 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:25:41,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:41,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 11:25:41,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 11:25:42,133 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 11:25:45,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [574652615] [2019-10-22 11:25:45,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163919959] [2019-10-22 11:25:45,242 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:45,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:25:45,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:45,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 11:25:45,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 11:25:45,425 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 11:25:47,263 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:47,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35, 35] total 68 [2019-10-22 11:25:47,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629873649] [2019-10-22 11:25:47,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-22 11:25:47,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-22 11:25:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=3961, Unknown=0, NotChecked=0, Total=4556 [2019-10-22 11:25:47,266 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 68 states. [2019-10-22 11:25:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:49,386 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2019-10-22 11:25:49,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-22 11:25:49,387 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 99 [2019-10-22 11:25:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:49,388 INFO L225 Difference]: With dead ends: 110 [2019-10-22 11:25:49,388 INFO L226 Difference]: Without dead ends: 104 [2019-10-22 11:25:49,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 317 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1287, Invalid=7833, Unknown=0, NotChecked=0, Total=9120 [2019-10-22 11:25:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-22 11:25:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-22 11:25:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-22 11:25:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-10-22 11:25:49,404 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2019-10-22 11:25:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:49,404 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-10-22 11:25:49,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-22 11:25:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-10-22 11:25:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-22 11:25:49,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:49,406 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:49,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:49,809 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 5 times [2019-10-22 11:25:49,809 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:49,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1101827527] [2019-10-22 11:25:49,810 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:50,073 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-22 11:25:50,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:25:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:50,267 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:25:50,267 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:25:50,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:50,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:50 BoogieIcfgContainer [2019-10-22 11:25:50,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:50,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:50,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:50,495 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:50,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:35" (3/4) ... [2019-10-22 11:25:50,497 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:25:50,560 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cf416dca-aa0d-486c-ba9f-a2909dfbe990/bin/utaipan/witness.graphml [2019-10-22 11:25:50,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:50,566 INFO L168 Benchmark]: Toolchain (without parser) took 15704.99 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 350.2 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -177.5 MB). Peak memory consumption was 172.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,566 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:50,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.32 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,566 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -211.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,567 INFO L168 Benchmark]: Boogie Preprocessor took 23.18 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. [2019-10-22 11:25:50,567 INFO L168 Benchmark]: RCFGBuilder took 202.54 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,567 INFO L168 Benchmark]: TraceAbstraction took 15098.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 193.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -5.3 MB). Peak memory consumption was 188.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,567 INFO L168 Benchmark]: Witness Printer took 65.34 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:50,569 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 215.32 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 95.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -211.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.18 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 202.54 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15098.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 193.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -5.3 MB). Peak memory consumption was 188.2 MB. Max. memory is 11.5 GB. * Witness Printer took 65.34 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 15.0s, OverallIterations: 6, TraceHistogramMax: 21, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 116 SDtfs, 8 SDslu, 1991 SDs, 0 SdLazy, 1027 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 812 GetRequests, 624 SyntacticMatches, 10 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 522 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 152624 SizeOfPredicates, 9 NumberOfNonLiveVariables, 542 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 1756/3512 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...