./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 9448a6696b4991e038dda55623feb6ffc9366da0 ..................................................................................................................................................................................................................................................................................................................................................................... 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_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 9448a6696b4991e038dda55623feb6ffc9366da0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:52,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:52,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:52,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:52,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:52,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:52,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:52,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:52,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:52,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:52,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:52,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:52,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:52,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:52,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:52,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:52,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:52,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:52,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:52,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:52,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:52,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:52,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:52,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:52,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:52,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:52,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:52,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:52,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:52,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:52,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:52,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:52,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:52,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:52,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:52,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:52,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:52,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:52,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:52,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:52,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:52,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:52,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:52,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:52,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:52,437 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:52,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:52,438 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:52,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:52,438 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:52,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:52,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:52,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:52,439 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:52,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:52,440 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:52,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:52,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:52,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:52,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:52,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:52,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:52,441 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:52,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:52,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:52,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:52,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:52,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:52,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:52,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:52,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:52,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:52,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:52,444 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:52,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:52,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:52,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:52,444 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_19bb5085-0be4-4ec7-85a4-183eae031065/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 -> 9448a6696b4991e038dda55623feb6ffc9366da0 [2019-10-22 11:25:52,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:52,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:52,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:52,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:52,495 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:52,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 11:25:52,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/74c507d06/209e05ac1c9146f2948e3b2b96500fb4/FLAG2bb3e0464 [2019-10-22 11:25:52,928 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:52,929 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 11:25:52,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/74c507d06/209e05ac1c9146f2948e3b2b96500fb4/FLAG2bb3e0464 [2019-10-22 11:25:53,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/74c507d06/209e05ac1c9146f2948e3b2b96500fb4 [2019-10-22 11:25:53,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:53,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:53,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:53,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:53,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:53,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59525fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53, skipping insertion in model container [2019-10-22 11:25:53,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,362 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:53,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:53,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:53,544 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:53,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:53,677 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:53,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53 WrapperNode [2019-10-22 11:25:53,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:53,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:53,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:53,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:53,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:53,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:53,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:53,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:53,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... [2019-10-22 11:25:53,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:53,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:53,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:53,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:53,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 11:25:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 11:25:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:53,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:53,779 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:53,911 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:53,911 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:53,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:53 BoogieIcfgContainer [2019-10-22 11:25:53,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:53,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:53,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:53,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:53,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:53" (1/3) ... [2019-10-22 11:25:53,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2138cafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:53, skipping insertion in model container [2019-10-22 11:25:53,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:53" (2/3) ... [2019-10-22 11:25:53,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2138cafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:53, skipping insertion in model container [2019-10-22 11:25:53,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:53" (3/3) ... [2019-10-22 11:25:53,925 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2019-10-22 11:25:53,936 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:53,943 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:53,955 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:53,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:53,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:53,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:53,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:53,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:53,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:53,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:53,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:25:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:54,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:54,017 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:54,019 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-10-22 11:25:54,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:54,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976823874] [2019-10-22 11:25:54,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:54,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976823874] [2019-10-22 11:25:54,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:54,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:25:54,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086505800] [2019-10-22 11:25:54,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:25:54,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:25:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:25:54,337 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-10-22 11:25:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:54,414 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-22 11:25:54,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:54,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 11:25:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:54,425 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:25:54,425 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:25:54,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:25:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:25:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:25:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 11:25:54,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-10-22 11:25:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:54,471 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 11:25:54,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:25:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 11:25:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:54,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:54,473 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:54,473 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-10-22 11:25:54,474 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:54,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856166885] [2019-10-22 11:25:54,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:54,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856166885] [2019-10-22 11:25:54,543 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:54,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:25:54,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900461090] [2019-10-22 11:25:54,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:54,545 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:54,546 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-10-22 11:25:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:54,621 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-22 11:25:54,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:54,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-22 11:25:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:54,623 INFO L225 Difference]: With dead ends: 29 [2019-10-22 11:25:54,623 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 11:25:54,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:25:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 11:25:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-22 11:25:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:25:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-22 11:25:54,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-22 11:25:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:54,630 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-22 11:25:54,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-22 11:25:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:25:54,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:54,632 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:54,632 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-10-22 11:25:54,632 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:54,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682300340] [2019-10-22 11:25:54,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:54,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:54,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682300340] [2019-10-22 11:25:54,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391617154] [2019-10-22 11:25:54,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:54,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:54,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:54,803 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:55,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:55,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:55,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1290893173] [2019-10-22 11:25:55,298 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 22 [2019-10-22 11:25:55,340 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:55,343 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:55,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:55,598 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:25:55,604 INFO L168 Benchmark]: Toolchain (without parser) took 2258.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -112.6 MB). Peak memory consumption was 82.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:55,604 INFO L168 Benchmark]: CDTParser took 0.20 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 11:25:55,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 946.4 MB in the beginning and 1.2 GB in the end (delta: -238.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:55,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:55,606 INFO L168 Benchmark]: Boogie Preprocessor took 15.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:55,607 INFO L168 Benchmark]: RCFGBuilder took 185.11 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: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:55,607 INFO L168 Benchmark]: TraceAbstraction took 1687.51 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: 105.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:55,610 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 332.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 946.4 MB in the beginning and 1.2 GB in the end (delta: -238.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.65 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 15.89 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 185.11 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: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1687.51 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: 105.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:57,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:57,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:57,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:57,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:57,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:57,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:57,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:57,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:57,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:57,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:57,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:57,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:57,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:57,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:57,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:57,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:57,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:57,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:57,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:57,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:57,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:57,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:57,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:57,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:57,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:57,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:57,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:57,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:57,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:57,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:57,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:57,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:57,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:57,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:57,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:57,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:57,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:57,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:57,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:57,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:57,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:57,829 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:57,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:57,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:57,831 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:57,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:57,831 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:57,831 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:57,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:57,832 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:57,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:57,832 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:57,833 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:57,834 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:57,834 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:57,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:57,834 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:57,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:57,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:57,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:57,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:57,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:57,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:57,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:57,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:57,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:57,836 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:57,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:57,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:57,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:57,837 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_19bb5085-0be4-4ec7-85a4-183eae031065/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 -> 9448a6696b4991e038dda55623feb6ffc9366da0 [2019-10-22 11:25:57,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:57,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:57,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:57,882 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:57,882 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:57,883 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 11:25:57,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/4fc6b5ec0/5e398b19bdab40d3a0fa6b2cc54e9ef1/FLAG8961b9597 [2019-10-22 11:25:58,330 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:58,331 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 11:25:58,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/4fc6b5ec0/5e398b19bdab40d3a0fa6b2cc54e9ef1/FLAG8961b9597 [2019-10-22 11:25:58,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/data/4fc6b5ec0/5e398b19bdab40d3a0fa6b2cc54e9ef1 [2019-10-22 11:25:58,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:58,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:58,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:58,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:58,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:58,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:58,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb7d7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58, skipping insertion in model container [2019-10-22 11:25:58,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:58,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:58,764 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:58,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:58,936 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:58,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:58,967 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:58,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58 WrapperNode [2019-10-22 11:25:58,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:58,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:58,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:58,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:58,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:58,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:59,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:59,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:59,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:59,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... [2019-10-22 11:25:59,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:59,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:59,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:59,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:59,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:59,128 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 11:25:59,129 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 11:25:59,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:59,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:59,129 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:59,129 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:59,269 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:59,269 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:59,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:59 BoogieIcfgContainer [2019-10-22 11:25:59,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:59,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:59,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:59,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:59,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:58" (1/3) ... [2019-10-22 11:25:59,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168ab182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:59, skipping insertion in model container [2019-10-22 11:25:59,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:58" (2/3) ... [2019-10-22 11:25:59,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168ab182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:59, skipping insertion in model container [2019-10-22 11:25:59,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:59" (3/3) ... [2019-10-22 11:25:59,278 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2019-10-22 11:25:59,289 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:59,297 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:59,307 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:59,334 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:59,335 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:59,335 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:59,335 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:59,335 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:59,335 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:59,335 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:59,335 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:25:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:59,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:59,354 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:59,356 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-10-22 11:25:59,369 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:59,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1726575327] [2019-10-22 11:25:59,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:59,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:59,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:59,524 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:59,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726575327] [2019-10-22 11:25:59,604 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:59,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-22 11:25:59,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712686988] [2019-10-22 11:25:59,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:59,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:59,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:59,619 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-10-22 11:25:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:59,711 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-22 11:25:59,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:59,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:25:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:59,722 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:25:59,722 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:25:59,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:25:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:25:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 11:25:59,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-10-22 11:25:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:59,762 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 11:25:59,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 11:25:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:59,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:59,764 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:59,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:59,965 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-10-22 11:25:59,965 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:59,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [710750473] [2019-10-22 11:25:59,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:00,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:26:00,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:00,076 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 11:26:00,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:00,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:00,289 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 11:26:00,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710750473] [2019-10-22 11:26:00,290 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:00,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2019-10-22 11:26:00,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734286581] [2019-10-22 11:26:00,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:26:00,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:00,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:26:00,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:26:00,293 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-10-22 11:26:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:00,385 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-22 11:26:00,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:26:00,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 11:26:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:00,387 INFO L225 Difference]: With dead ends: 29 [2019-10-22 11:26:00,387 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 11:26:00,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:26:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 11:26:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-22 11:26:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:26:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-22 11:26:00,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-22 11:26:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:00,396 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-22 11:26:00,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:26:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-22 11:26:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:26:00,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:00,398 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:00,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:00,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-10-22 11:26:00,600 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:00,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [589419165] [2019-10-22 11:26:00,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:00,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:26:00,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:00,740 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:00,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:01,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:26:01,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589419165] [2019-10-22 11:26:01,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707019508] [2019-10-22 11:26:01,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:01,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:26:01,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:01,133 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:01,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:01,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:26:01,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:01,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 12 [2019-10-22 11:26:01,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419641595] [2019-10-22 11:26:01,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 11:26:01,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:01,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 11:26:01,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:26:01,383 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2019-10-22 11:26:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:01,538 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-22 11:26:01,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:26:01,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-10-22 11:26:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:01,540 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:26:01,540 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 11:26:01,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:26:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 11:26:01,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 11:26:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 11:26:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-22 11:26:01,547 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-10-22 11:26:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:01,548 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-22 11:26:01,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 11:26:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-22 11:26:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 11:26:01,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:01,550 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:01,951 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 11:26:01,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-10-22 11:26:01,952 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:01,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [197604673] [2019-10-22 11:26:01,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:01,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:26:01,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:26:02,057 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:02,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:02,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197604673] [2019-10-22 11:26:02,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52198183] [2019-10-22 11:26:02,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:02,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:26:02,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:26:02,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:02,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:02,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:02,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 11] total 14 [2019-10-22 11:26:02,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937080182] [2019-10-22 11:26:02,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 11:26:02,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 11:26:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:26:02,725 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2019-10-22 11:26:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:02,834 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-22 11:26:02,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:26:02,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-10-22 11:26:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:02,835 INFO L225 Difference]: With dead ends: 41 [2019-10-22 11:26:02,835 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 11:26:02,836 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-10-22 11:26:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 11:26:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-10-22 11:26:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 11:26:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 11:26:02,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-10-22 11:26:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:02,841 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 11:26:02,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 11:26:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 11:26:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 11:26:02,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:02,843 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:03,243 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 11:26:03,243 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-10-22 11:26:03,244 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:03,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1073127944] [2019-10-22 11:26:03,244 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:03,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:03,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:03,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:26:03,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:26:03,376 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:03,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:03,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:03,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:03,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:26:03,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073127944] [2019-10-22 11:26:03,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295746694] [2019-10-22 11:26:03,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:03,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:03,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:03,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:26:03,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:26:03,883 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:04,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:04,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:04,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:04,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:26:04,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:04,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 13] total 16 [2019-10-22 11:26:04,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053541760] [2019-10-22 11:26:04,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 11:26:04,261 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 11:26:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:26:04,261 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 16 states. [2019-10-22 11:26:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:04,419 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-22 11:26:04,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:26:04,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-10-22 11:26:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:04,420 INFO L225 Difference]: With dead ends: 47 [2019-10-22 11:26:04,421 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 11:26:04,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:26:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 11:26:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-22 11:26:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:26:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-22 11:26:04,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-10-22 11:26:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:04,425 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-22 11:26:04,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 11:26:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-22 11:26:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 11:26:04,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:04,426 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:04,827 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 11:26:04,827 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-10-22 11:26:04,827 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:04,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1438570992] [2019-10-22 11:26:04,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:04,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:04,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:04,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:26:04,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 11:26:05,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 11:26:05,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438570992] [2019-10-22 11:26:05,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557812043] [2019-10-22 11:26:05,371 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:05,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:05,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:05,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:26:05,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 11:26:05,446 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 11:26:05,830 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:05,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 15 [2019-10-22 11:26:05,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812277367] [2019-10-22 11:26:05,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:26:05,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:26:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:26:05,831 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-10-22 11:26:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:05,932 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-10-22 11:26:05,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 11:26:05,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-10-22 11:26:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:05,934 INFO L225 Difference]: With dead ends: 53 [2019-10-22 11:26:05,934 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 11:26:05,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:26:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 11:26:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-10-22 11:26:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 11:26:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-22 11:26:05,940 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2019-10-22 11:26:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:05,940 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-22 11:26:05,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:26:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-22 11:26:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 11:26:05,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:05,941 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:06,342 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 11:26:06,343 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:06,343 INFO L82 PathProgramCache]: Analyzing trace with hash 688258629, now seen corresponding path program 3 times [2019-10-22 11:26:06,343 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:06,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1768171184] [2019-10-22 11:26:06,344 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/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 11:26:06,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:26:06,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:06,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:26:06,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-22 11:26:06,500 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-22 11:26:07,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768171184] [2019-10-22 11:26:07,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924641542] [2019-10-22 11:26:07,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:07,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:26:07,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:07,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 11:26:07,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-22 11:26:07,374 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:07,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:07,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:07,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:07,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:08,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:08,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-22 11:26:08,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:08,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12, 17] total 32 [2019-10-22 11:26:08,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039215379] [2019-10-22 11:26:08,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-22 11:26:08,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-22 11:26:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2019-10-22 11:26:08,125 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 32 states. [2019-10-22 11:26:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:08,881 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2019-10-22 11:26:08,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 11:26:08,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-10-22 11:26:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:08,882 INFO L225 Difference]: With dead ends: 77 [2019-10-22 11:26:08,882 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:26:08,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2019-10-22 11:26:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:26:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:26:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:26:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:26:08,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-10-22 11:26:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:08,885 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:26:08,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-22 11:26:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:26:08,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:26:09,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:09,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:26:09,383 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (= |id2_#in~x| id2_~x) (not (= |id2_#in~x| (_ bv0 32)))) [2019-10-22 11:26:09,383 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-22 11:26:09,383 INFO L443 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-10-22 11:26:09,383 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2019-10-22 11:26:09,383 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L439 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~input~0 (_ bv4294967291 32)) (_ bv0 32)) [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2019-10-22 11:26:09,384 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2019-10-22 11:26:09,385 INFO L439 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (= id_~x |id_#in~x|) [2019-10-22 11:26:09,385 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-10-22 11:26:09,385 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-10-22 11:26:09,385 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2019-10-22 11:26:09,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:09 BoogieIcfgContainer [2019-10-22 11:26:09,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:09,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:09,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:09,389 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:09,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:59" (3/4) ... [2019-10-22 11:26:09,396 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:26:09,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-10-22 11:26:09,404 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 11:26:09,408 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 11:26:09,410 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:26:09,449 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_19bb5085-0be4-4ec7-85a4-183eae031065/bin/utaipan/witness.graphml [2019-10-22 11:26:09,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:09,451 INFO L168 Benchmark]: Toolchain (without parser) took 10721.71 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.8 MB). Free memory was 952.3 MB in the beginning and 1.3 GB in the end (delta: -309.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:09,451 INFO L168 Benchmark]: CDTParser took 0.20 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 11:26:09,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.24 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:09,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.28 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:09,452 INFO L168 Benchmark]: Boogie Preprocessor took 79.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -212.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:09,453 INFO L168 Benchmark]: RCFGBuilder took 188.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:09,453 INFO L168 Benchmark]: TraceAbstraction took 10117.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 161.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -125.7 MB). Peak memory consumption was 35.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:09,453 INFO L168 Benchmark]: Witness Printer took 60.65 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:09,455 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 236.24 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.28 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -212.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 188.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10117.55 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 161.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -125.7 MB). Peak memory consumption was 35.8 MB. Max. memory is 11.5 GB. * Witness Printer took 60.65 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 10.0s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 169 SDslu, 1150 SDs, 0 SdLazy, 1026 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 726 GetRequests, 582 SyntacticMatches, 18 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 18 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 67 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 354 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 684 ConstructedInterpolants, 0 QuantifiedInterpolants, 79876 SizeOfPredicates, 51 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 185/456 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...