./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec-1.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_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 e8f83f4c04fbac90273b8f8e733ac05d1463068f ................................................................................................................................................................................................................................................................................... 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_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 e8f83f4c04fbac90273b8f8e733ac05d1463068f ......................................................................................................................................................................................................................................................................................................... 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 11:24:52,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:52,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:52,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:52,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:52,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:52,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:52,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:52,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:52,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:52,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:52,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:52,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:52,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:52,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:52,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:52,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:52,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:52,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:52,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:52,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:52,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:52,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:52,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:52,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:52,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:52,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:52,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:52,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:52,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:52,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:52,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:52,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:52,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:52,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:52,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:52,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:52,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:52,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:52,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:52,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:52,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:24:52,238 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:52,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:52,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:52,240 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:52,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:52,241 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:52,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:24:52,241 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:52,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:52,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:24:52,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:24:52,242 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:52,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:52,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:52,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:24:52,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:52,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:52,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:52,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:52,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:52,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:52,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:52,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:52,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:52,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:52,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:52,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:52,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:52,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:52,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:52,248 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_03435b5b-082b-4c58-8644-34794a8d4208/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 -> e8f83f4c04fbac90273b8f8e733ac05d1463068f [2019-10-22 11:24:52,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:52,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:52,284 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:52,285 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:52,285 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:52,286 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2019-10-22 11:24:52,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/39e531742/7bad7ee3ae0a489581e51a508fd0b260/FLAGb3f548a12 [2019-10-22 11:24:52,703 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:52,703 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/sv-benchmarks/c/recursive-simple/afterrec-1.c [2019-10-22 11:24:52,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/39e531742/7bad7ee3ae0a489581e51a508fd0b260/FLAGb3f548a12 [2019-10-22 11:24:53,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/39e531742/7bad7ee3ae0a489581e51a508fd0b260 [2019-10-22 11:24:53,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:53,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:53,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:53,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:53,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:53,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e355c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53, skipping insertion in model container [2019-10-22 11:24:53,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,141 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:53,155 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:53,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:53,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:53,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:53,407 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:53,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53 WrapperNode [2019-10-22 11:24:53,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:53,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:53,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:53,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:53,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:53,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:53,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:53,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:53,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... [2019-10-22 11:24:53,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:53,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:53,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:53,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:53,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 11:24:53,500 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-10-22 11:24:53,501 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-10-22 11:24:53,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:53,609 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:53,610 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:24:53,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:53 BoogieIcfgContainer [2019-10-22 11:24:53,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:53,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:53,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:53,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:53,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:53" (1/3) ... [2019-10-22 11:24:53,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7380538b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:53, skipping insertion in model container [2019-10-22 11:24:53,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:53" (2/3) ... [2019-10-22 11:24:53,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7380538b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:53, skipping insertion in model container [2019-10-22 11:24:53,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:53" (3/3) ... [2019-10-22 11:24:53,617 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2019-10-22 11:24:53,627 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:53,633 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:53,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:53,683 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:53,684 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:53,684 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:53,684 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:53,684 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:53,684 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:53,684 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:53,684 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:24:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:24:53,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:53,712 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:53,714 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1875137816, now seen corresponding path program 1 times [2019-10-22 11:24:53,730 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:53,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096486782] [2019-10-22 11:24:53,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:53,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:53,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:53,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096486782] [2019-10-22 11:24:53,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591668503] [2019-10-22 11:24:53,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 11:24:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:53,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:53,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:53,982 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:54,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [877194585] [2019-10-22 11:24:54,107 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 11 [2019-10-22 11:24:54,139 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:24:54,139 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:24:54,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:54,381 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 11:24:54,388 INFO L168 Benchmark]: Toolchain (without parser) took 1258.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -143.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,389 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:54,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -202.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.68 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,392 INFO L168 Benchmark]: Boogie Preprocessor took 14.40 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,392 INFO L168 Benchmark]: RCFGBuilder took 159.68 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: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,393 INFO L168 Benchmark]: TraceAbstraction took 771.67 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: 38.2 MB). Peak memory consumption was 38.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:54,396 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -202.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.68 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.40 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 159.68 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: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 771.67 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: 38.2 MB). Peak memory consumption was 38.2 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 11:24:56,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:56,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:56,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:56,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:56,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:56,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:56,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:56,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:56,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:56,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:56,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:56,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:56,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:56,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:56,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:56,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:56,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:56,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:56,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:56,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:56,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:56,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:56,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:56,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:56,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:56,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:56,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:56,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:56,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:56,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:56,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:56,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:56,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:56,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:56,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:56,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:56,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:56,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:56,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:56,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:56,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:24:56,526 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:56,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:56,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:56,527 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:56,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:56,528 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:56,528 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:56,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:56,528 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:56,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:56,529 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:56,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:56,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:56,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:56,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:24:56,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:56,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:56,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:56,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:56,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:56,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:56,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:56,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:56,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:56,532 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:24:56,532 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:24:56,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:56,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:56,533 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_03435b5b-082b-4c58-8644-34794a8d4208/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 -> e8f83f4c04fbac90273b8f8e733ac05d1463068f [2019-10-22 11:24:56,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:56,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:56,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:56,582 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:56,582 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:56,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2019-10-22 11:24:56,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/292eab4dd/d616617060554a03987e08891f1c2354/FLAG9a9b53c35 [2019-10-22 11:24:57,023 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:57,024 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/sv-benchmarks/c/recursive-simple/afterrec-1.c [2019-10-22 11:24:57,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/292eab4dd/d616617060554a03987e08891f1c2354/FLAG9a9b53c35 [2019-10-22 11:24:57,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/data/292eab4dd/d616617060554a03987e08891f1c2354 [2019-10-22 11:24:57,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:57,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:57,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:57,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:57,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:57,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb72ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57, skipping insertion in model container [2019-10-22 11:24:57,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,066 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:57,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:57,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:57,238 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:57,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:57,269 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:57,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57 WrapperNode [2019-10-22 11:24:57,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:57,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:57,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:57,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:57,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:57,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:57,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:57,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:57,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... [2019-10-22 11:24:57,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:57,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:57,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:57,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:57,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 11:24:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-10-22 11:24:57,446 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-10-22 11:24:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:57,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:57,605 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:57,605 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:24:57,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:57 BoogieIcfgContainer [2019-10-22 11:24:57,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:57,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:57,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:57,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:57,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:57" (1/3) ... [2019-10-22 11:24:57,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a9c290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:57, skipping insertion in model container [2019-10-22 11:24:57,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:57" (2/3) ... [2019-10-22 11:24:57,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a9c290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:57, skipping insertion in model container [2019-10-22 11:24:57,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:57" (3/3) ... [2019-10-22 11:24:57,615 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2019-10-22 11:24:57,624 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:57,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:57,642 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:57,669 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:57,670 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:57,670 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:57,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:57,671 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:57,671 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:57,671 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:57,671 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:24:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:24:57,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:57,697 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:57,699 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1875137816, now seen corresponding path program 1 times [2019-10-22 11:24:57,715 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:57,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1760886085] [2019-10-22 11:24:57,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/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 11:24:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:57,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:57,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:57,913 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:58,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760886085] [2019-10-22 11:24:58,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266763961] [2019-10-22 11:24:58,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:58,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:24:58,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:58,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:58,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:58,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 13 [2019-10-22 11:24:58,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539506821] [2019-10-22 11:24:58,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 11:24:58,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 11:24:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:24:58,342 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 13 states. [2019-10-22 11:24:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:58,500 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2019-10-22 11:24:58,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:24:58,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2019-10-22 11:24:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:58,510 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:24:58,510 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 11:24:58,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:24:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 11:24:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 11:24:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 11:24:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-22 11:24:58,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-22 11:24:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:58,549 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-22 11:24:58,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 11:24:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-22 11:24:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:24:58,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:58,551 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:58,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:58,952 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1336844716, now seen corresponding path program 2 times [2019-10-22 11:24:58,953 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:58,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [73081985] [2019-10-22 11:24:58,953 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:59,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:59,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:24:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:24:59,039 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:24:59,039 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:24:59,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:59,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:24:59 BoogieIcfgContainer [2019-10-22 11:24:59,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:24:59,260 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:24:59,260 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:24:59,261 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:24:59,261 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:57" (3/4) ... [2019-10-22 11:24:59,264 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:24:59,298 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_03435b5b-082b-4c58-8644-34794a8d4208/bin/utaipan/witness.graphml [2019-10-22 11:24:59,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:24:59,300 INFO L168 Benchmark]: Toolchain (without parser) took 2252.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 952.3 MB in the beginning and 1.0 GB in the end (delta: -94.4 MB). Peak memory consumption was 56.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:59,301 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 11:24:59,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.83 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 11:24:59,302 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -211.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:59,302 INFO L168 Benchmark]: Boogie Preprocessor took 20.39 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: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:59,303 INFO L168 Benchmark]: RCFGBuilder took 222.94 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:59,303 INFO L168 Benchmark]: TraceAbstraction took 1652.29 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: 73.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:59,304 INFO L168 Benchmark]: Witness Printer took 37.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:59,306 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 221.83 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 91.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -211.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.39 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: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 222.94 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1652.29 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: 73.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 11.5 GB. * Witness Printer took 37.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] CALL f(4) VAL [\old(n)=4] [L4] COND FALSE !(n<3) [L5] n-- VAL [\old(n)=4, n=3] [L6] CALL f(n) VAL [\old(n)=3] [L4] COND FALSE !(n<3) [L5] n-- VAL [\old(n)=3, n=2] [L6] CALL f(n) VAL [\old(n)=2] [L4] COND TRUE n<3 VAL [\old(n)=2, n=2] [L6] RET f(n) VAL [\old(n)=3, n=2] [L7] __VERIFIER_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5 SDtfs, 9 SDslu, 11 SDs, 0 SdLazy, 25 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1116 SizeOfPredicates, 6 NumberOfNonLiveVariables, 34 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 0 PerfectInterpolantSequences, 0/8 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...