./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --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_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 c5465a084053aead702161d951dd339bfa1665d5 ................................................................................................................................................................................................................................................................................................................................................................ 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_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 c5465a084053aead702161d951dd339bfa1665d5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:22:22,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:22,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:22,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:22,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:22,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:22,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:22,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:22,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:22,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:22,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:22,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:22,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:22,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:22,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:22,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:22,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:22,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:22,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:22,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:22,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:22,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:22,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:22,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:22,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:22,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:22,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:22,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:22,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:22,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:22,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:22,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:22,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:22,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:22,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:22,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:22,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:22,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:22,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:22,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:22,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:22,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:22:22,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:22,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:22,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:22,280 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:22,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:22,281 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:22,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:22,281 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:22,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:22,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:22,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:22,282 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:22,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:22,283 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:22,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:22,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:22,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:22,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:22,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:22,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:22,285 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:22,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:22,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:22,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:22,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:22,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:22,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:22,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:22,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:22,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:22,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:22,288 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:22,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:22,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:22,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:22,289 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_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 -> c5465a084053aead702161d951dd339bfa1665d5 [2019-10-22 11:22:22,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:22,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:22,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:22,354 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:22,354 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:22,355 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/../../sv-benchmarks/c/loops/sum01_bug02.i [2019-10-22 11:22:22,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/8851edc27/49a962d94fce4715b61b15166937e272/FLAGa6ac1a256 [2019-10-22 11:22:22,843 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:22,844 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/sv-benchmarks/c/loops/sum01_bug02.i [2019-10-22 11:22:22,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/8851edc27/49a962d94fce4715b61b15166937e272/FLAGa6ac1a256 [2019-10-22 11:22:23,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/8851edc27/49a962d94fce4715b61b15166937e272 [2019-10-22 11:22:23,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:23,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:23,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:23,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:23,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:23,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d75fa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23, skipping insertion in model container [2019-10-22 11:22:23,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:23,262 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:23,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:23,464 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:23,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:23,559 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:23,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23 WrapperNode [2019-10-22 11:22:23,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:23,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:23,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:23,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:23,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:23,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:23,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:23,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:23,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... [2019-10-22 11:22:23,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:23,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:23,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:23,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:23,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:23,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:23,906 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:23,906 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:22:23,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:23 BoogieIcfgContainer [2019-10-22 11:22:23,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:23,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:23,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:23,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:23" (1/3) ... [2019-10-22 11:22:23,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdbe39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:23, skipping insertion in model container [2019-10-22 11:22:23,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:23" (2/3) ... [2019-10-22 11:22:23,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdbe39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:23, skipping insertion in model container [2019-10-22 11:22:23,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:23" (3/3) ... [2019-10-22 11:22:23,920 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-10-22 11:22:23,929 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:23,937 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:23,948 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:23,970 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:23,970 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:23,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:23,971 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:23,971 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:23,971 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:23,971 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:23,971 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:22:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:23,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:23,986 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:23,988 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 30170436, now seen corresponding path program 1 times [2019-10-22 11:22:24,002 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:24,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904319954] [2019-10-22 11:22:24,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:24,112 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 11:22:24,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904319954] [2019-10-22 11:22:24,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:24,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:22:24,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964098667] [2019-10-22 11:22:24,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:22:24,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:22:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:24,130 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 11:22:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:24,141 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-10-22 11:22:24,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:22:24,143 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:22:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:24,151 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:22:24,151 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:22:24,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:22:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 11:22:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:22:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:22:24,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:22:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:24,181 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:22:24,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:22:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:22:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:24,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:24,182 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:24,182 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:24,183 INFO L82 PathProgramCache]: Analyzing trace with hash 29783153, now seen corresponding path program 1 times [2019-10-22 11:22:24,183 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:24,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509734396] [2019-10-22 11:22:24,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:24,248 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 11:22:24,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509734396] [2019-10-22 11:22:24,249 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:24,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:22:24,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631657890] [2019-10-22 11:22:24,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:24,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:24,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:24,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:24,253 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-10-22 11:22:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:24,451 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-10-22 11:22:24,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:24,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:22:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:24,454 INFO L225 Difference]: With dead ends: 17 [2019-10-22 11:22:24,454 INFO L226 Difference]: Without dead ends: 13 [2019-10-22 11:22:24,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-22 11:22:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-22 11:22:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-22 11:22:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-10-22 11:22:24,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2019-10-22 11:22:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:24,458 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-10-22 11:22:24,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-10-22 11:22:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:22:24,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:24,459 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:24,460 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -963514282, now seen corresponding path program 1 times [2019-10-22 11:22:24,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:24,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351258093] [2019-10-22 11:22:24,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:24,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:24,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351258093] [2019-10-22 11:22:24,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469885178] [2019-10-22 11:22:24,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:24,709 WARN L254 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:24,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:24,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:24,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:25,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1828006481] [2019-10-22 11:22:25,059 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 10 [2019-10-22 11:22:25,107 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:22:25,107 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:22:25,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:25,417 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 11:22:25,422 INFO L168 Benchmark]: Toolchain (without parser) took 2213.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -111.8 MB). Peak memory consumption was 55.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:25,423 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:25,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -221.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:25,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.14 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 11:22:25,424 INFO L168 Benchmark]: Boogie Preprocessor took 28.48 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 11:22:25,425 INFO L168 Benchmark]: RCFGBuilder took 280.13 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:25,425 INFO L168 Benchmark]: TraceAbstraction took 1511.12 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: 84.0 MB). Peak memory consumption was 84.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:25,440 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 351.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -221.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.48 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 280.13 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1511.12 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: 84.0 MB). Peak memory consumption was 84.0 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 11:22:27,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:27,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:27,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:27,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:27,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:27,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:27,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:27,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:27,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:27,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:27,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:27,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:27,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:27,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:27,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:27,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:27,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:27,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:27,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:27,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:27,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:27,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:27,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:27,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:27,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:27,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:27,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:27,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:27,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:27,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:27,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:27,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:27,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:27,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:27,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:27,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:27,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:27,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:27,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:27,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:27,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:22:27,698 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:27,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:27,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:27,700 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:27,700 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:27,700 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:27,700 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:27,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:27,700 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:27,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:27,701 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:27,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:22:27,702 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:27,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:27,703 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:22:27,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:27,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:27,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:27,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:27,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:27,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:27,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:27,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:27,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:27,705 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:22:27,705 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:22:27,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:27,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:27,705 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_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 -> c5465a084053aead702161d951dd339bfa1665d5 [2019-10-22 11:22:27,739 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:27,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:27,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:27,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:27,762 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:27,762 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/../../sv-benchmarks/c/loops/sum01_bug02.i [2019-10-22 11:22:27,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/56592b33e/a25fb5a045fa4cc9b24e974a9aac3c06/FLAGcd05f9e80 [2019-10-22 11:22:28,194 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:28,195 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/sv-benchmarks/c/loops/sum01_bug02.i [2019-10-22 11:22:28,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/56592b33e/a25fb5a045fa4cc9b24e974a9aac3c06/FLAGcd05f9e80 [2019-10-22 11:22:28,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/data/56592b33e/a25fb5a045fa4cc9b24e974a9aac3c06 [2019-10-22 11:22:28,214 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:28,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:28,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:28,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:28,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:28,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea7f656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28, skipping insertion in model container [2019-10-22 11:22:28,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,230 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:28,243 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:28,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:28,392 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:28,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:28,426 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:28,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28 WrapperNode [2019-10-22 11:22:28,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:28,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:28,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:28,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:28,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:28,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:28,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:28,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:28,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... [2019-10-22 11:22:28,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:28,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:28,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:28,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:28,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:28,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:28,767 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:28,767 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:22:28,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:28 BoogieIcfgContainer [2019-10-22 11:22:28,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:28,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:28,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:28,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:28,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:28" (1/3) ... [2019-10-22 11:22:28,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f8609a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:28, skipping insertion in model container [2019-10-22 11:22:28,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:28" (2/3) ... [2019-10-22 11:22:28,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f8609a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:28, skipping insertion in model container [2019-10-22 11:22:28,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:28" (3/3) ... [2019-10-22 11:22:28,775 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-10-22 11:22:28,783 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:28,788 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:28,798 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:28,821 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:28,821 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:28,822 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:28,822 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:28,822 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:28,822 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:28,822 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:28,822 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:22:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:28,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:28,840 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:28,841 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash 30170436, now seen corresponding path program 1 times [2019-10-22 11:22:28,855 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:28,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [877939572] [2019-10-22 11:22:28,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:28,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:22:28,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:28,923 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 11:22:28,924 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:28,927 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 11:22:28,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [877939572] [2019-10-22 11:22:28,928 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:28,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:22:28,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019353414] [2019-10-22 11:22:28,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:22:28,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:28,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:22:28,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:28,962 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 11:22:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:28,974 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-10-22 11:22:28,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:22:28,975 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:22:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:28,983 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:22:28,983 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:22:28,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:22:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 11:22:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:22:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:22:29,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:22:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:29,009 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:22:29,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:22:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:22:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:29,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:29,010 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:29,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:29,211 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash 29783153, now seen corresponding path program 1 times [2019-10-22 11:22:29,211 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:29,211 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [517148773] [2019-10-22 11:22:29,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:29,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:29,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:29,271 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 11:22:29,271 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:29,314 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 11:22:29,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517148773] [2019-10-22 11:22:29,314 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:29,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:22:29,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33340306] [2019-10-22 11:22:29,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:22:29,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:22:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:29,316 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2019-10-22 11:22:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:29,345 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-10-22 11:22:29,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:29,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-10-22 11:22:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:29,346 INFO L225 Difference]: With dead ends: 17 [2019-10-22 11:22:29,346 INFO L226 Difference]: Without dead ends: 13 [2019-10-22 11:22:29,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:22:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-22 11:22:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-22 11:22:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-22 11:22:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-10-22 11:22:29,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2019-10-22 11:22:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:29,350 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-10-22 11:22:29,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:22:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-10-22 11:22:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:22:29,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:29,351 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:29,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:29,551 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash -963514282, now seen corresponding path program 1 times [2019-10-22 11:22:29,552 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:29,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [993177684] [2019-10-22 11:22:29,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/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 11:22:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:29,597 WARN L254 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:29,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:29,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:29,750 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:30,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993177684] [2019-10-22 11:22:30,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815042266] [2019-10-22 11:22:30,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:30,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:30,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:30,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:30,112 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:30,120 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:30,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 13 [2019-10-22 11:22:30,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996889992] [2019-10-22 11:22:30,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 11:22:30,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 11:22:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:22:30,122 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 14 states. [2019-10-22 11:22:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:30,573 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-10-22 11:22:30,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:22:30,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 9 [2019-10-22 11:22:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:30,575 INFO L225 Difference]: With dead ends: 34 [2019-10-22 11:22:30,575 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 11:22:30,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2019-10-22 11:22:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 11:22:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-10-22 11:22:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 11:22:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 11:22:30,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-10-22 11:22:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:30,586 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 11:22:30,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 11:22:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 11:22:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:22:30,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:30,587 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:30,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:30,988 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1771006013, now seen corresponding path program 1 times [2019-10-22 11:22:30,989 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:30,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [157708914] [2019-10-22 11:22:30,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:31,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:22:31,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:31,073 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:31,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157708914] [2019-10-22 11:22:31,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132501909] [2019-10-22 11:22:31,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:31,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:22:31,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:31,184 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:31,187 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:31,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 7 [2019-10-22 11:22:31,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68516108] [2019-10-22 11:22:31,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:22:31,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:22:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:22:31,195 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-10-22 11:22:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:31,445 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-22 11:22:31,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:22:31,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-10-22 11:22:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:31,447 INFO L225 Difference]: With dead ends: 34 [2019-10-22 11:22:31,447 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 11:22:31,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:22:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 11:22:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-10-22 11:22:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:22:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-22 11:22:31,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-10-22 11:22:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:31,452 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-22 11:22:31,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:22:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-22 11:22:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 11:22:31,453 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:31,453 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 11:22:31,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:31,854 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1276819616, now seen corresponding path program 2 times [2019-10-22 11:22:31,855 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:31,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [435650046] [2019-10-22 11:22:31,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:31,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:31,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:31,941 WARN L254 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:31,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:32,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,245 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [435650046] [2019-10-22 11:22:33,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117725049] [2019-10-22 11:22:33,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:33,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:33,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:33,243 WARN L254 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:33,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:33,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,331 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:33,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13] total 25 [2019-10-22 11:22:33,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787781005] [2019-10-22 11:22:33,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 11:22:33,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 11:22:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2019-10-22 11:22:33,333 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 26 states. [2019-10-22 11:22:33,919 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-10-22 11:22:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:35,256 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-10-22 11:22:35,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 11:22:35,257 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 17 [2019-10-22 11:22:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:35,259 INFO L225 Difference]: With dead ends: 48 [2019-10-22 11:22:35,259 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 11:22:35,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2019-10-22 11:22:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 11:22:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2019-10-22 11:22:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 11:22:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-22 11:22:35,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 17 [2019-10-22 11:22:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:35,269 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-22 11:22:35,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 11:22:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-22 11:22:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:22:35,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:35,270 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:35,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:35,671 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -242812025, now seen corresponding path program 2 times [2019-10-22 11:22:35,672 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:35,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1692119044] [2019-10-22 11:22:35,672 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:35,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:35,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:35,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:35,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:35,822 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:36,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692119044] [2019-10-22 11:22:36,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235038008] [2019-10-22 11:22:36,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:36,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:36,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:36,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:22:36,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:36,104 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:36,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:36,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9] total 18 [2019-10-22 11:22:36,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096278068] [2019-10-22 11:22:36,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 11:22:36,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 11:22:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-10-22 11:22:36,309 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 19 states. [2019-10-22 11:22:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:37,044 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-22 11:22:37,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:22:37,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2019-10-22 11:22:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:37,046 INFO L225 Difference]: With dead ends: 43 [2019-10-22 11:22:37,046 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 11:22:37,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:22:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 11:22:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-22 11:22:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 11:22:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-22 11:22:37,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 21 [2019-10-22 11:22:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:37,052 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-22 11:22:37,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 11:22:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-22 11:22:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 11:22:37,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:37,053 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:37,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:37,454 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1174166319, now seen corresponding path program 3 times [2019-10-22 11:22:37,454 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:37,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1420116918] [2019-10-22 11:22:37,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:37,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-22 11:22:37,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:22:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:37,646 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:22:37,646 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:22:37,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:37,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:37 BoogieIcfgContainer [2019-10-22 11:22:37,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:37,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:37,865 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:37,865 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:37,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:28" (3/4) ... [2019-10-22 11:22:37,867 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:22:37,905 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c36ae20d-35a1-4c37-92bd-62aa4f2768b4/bin/utaipan/witness.graphml [2019-10-22 11:22:37,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:37,907 INFO L168 Benchmark]: Toolchain (without parser) took 9691.56 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 240.6 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -100.9 MB). Peak memory consumption was 139.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:37,907 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:37,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.67 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:37,908 INFO L168 Benchmark]: Boogie Procedure Inliner took 128.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -234.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:37,909 INFO L168 Benchmark]: Boogie Preprocessor took 20.97 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 11:22:37,909 INFO L168 Benchmark]: RCFGBuilder took 190.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:37,912 INFO L168 Benchmark]: TraceAbstraction took 9095.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 60.3 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 95.8 MB). Peak memory consumption was 156.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:37,915 INFO L168 Benchmark]: Witness Printer took 41.12 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:37,917 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 210.67 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 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 128.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -234.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.97 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 190.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9095.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 60.3 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 95.8 MB). Peak memory consumption was 156.1 MB. Max. memory is 11.5 GB. * Witness Printer took 41.12 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i