./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 ...................................................................................................................................................................................................................................................................................................................................................................... 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_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: expected NNF --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:23:39,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:39,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:39,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:39,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:39,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:39,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:39,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:39,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:39,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:39,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:39,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:39,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:39,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:39,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:39,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:39,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:39,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:39,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:39,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:39,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:39,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:39,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:39,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:39,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:39,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:39,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:39,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:39,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:39,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:39,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:39,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:39,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:39,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:39,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:39,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:39,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:39,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:39,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:39,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:39,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:39,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:23:39,488 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:39,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:39,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:39,501 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:39,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:39,501 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:39,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:23:39,501 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:39,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:39,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:23:39,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:23:39,502 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:39,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:39,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:39,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:39,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:23:39,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:39,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:39,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:39,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:39,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:39,505 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:23:39,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:23:39,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:39,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:39,508 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_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 -> 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 [2019-10-22 11:23:39,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:39,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:39,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:39,557 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:39,557 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:39,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-10-22 11:23:39,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/3eeaaaed3/0eb1d1dbc06c497d93a231876f62debe/FLAG534ffe448 [2019-10-22 11:23:40,101 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:40,105 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-10-22 11:23:40,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/3eeaaaed3/0eb1d1dbc06c497d93a231876f62debe/FLAG534ffe448 [2019-10-22 11:23:40,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/3eeaaaed3/0eb1d1dbc06c497d93a231876f62debe [2019-10-22 11:23:40,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:40,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:40,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:40,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:40,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:40,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:40" (1/1) ... [2019-10-22 11:23:40,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c4d0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:40, skipping insertion in model container [2019-10-22 11:23:40,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:40" (1/1) ... [2019-10-22 11:23:40,402 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:40,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:40,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:40,887 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:40,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:41,031 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:41,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41 WrapperNode [2019-10-22 11:23:41,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:41,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:41,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:41,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:41,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:41,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:41,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:41,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:41,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... [2019-10-22 11:23:41,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:41,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:41,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:41,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:41,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:23:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:23:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:23:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:23:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:23:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:23:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-22 11:23:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:41,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:41,527 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:41,527 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-10-22 11:23:41,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:41 BoogieIcfgContainer [2019-10-22 11:23:41,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:41,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:41,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:41,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:41,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:40" (1/3) ... [2019-10-22 11:23:41,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3e859e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:41, skipping insertion in model container [2019-10-22 11:23:41,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:41" (2/3) ... [2019-10-22 11:23:41,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3e859e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:41, skipping insertion in model container [2019-10-22 11:23:41,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:41" (3/3) ... [2019-10-22 11:23:41,536 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-10-22 11:23:41,546 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:41,554 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:41,566 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:41,607 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:41,608 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:41,608 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:41,608 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:41,608 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:41,608 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:41,608 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:41,608 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 11:23:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:23:41,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:41,630 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:41,632 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash -409317193, now seen corresponding path program 1 times [2019-10-22 11:23:41,644 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:41,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962344490] [2019-10-22 11:23:41,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:41,759 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 11:23:41,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962344490] [2019-10-22 11:23:41,761 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:41,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:23:41,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616690679] [2019-10-22 11:23:41,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:23:41,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:23:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:41,778 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-10-22 11:23:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:41,794 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2019-10-22 11:23:41,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:23:41,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-22 11:23:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:41,805 INFO L225 Difference]: With dead ends: 38 [2019-10-22 11:23:41,805 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:23:41,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:23:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 11:23:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:23:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 11:23:41,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2019-10-22 11:23:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:41,873 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 11:23:41,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:23:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-22 11:23:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:23:41,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:41,874 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:41,886 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1724474201, now seen corresponding path program 1 times [2019-10-22 11:23:41,887 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:41,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601765816] [2019-10-22 11:23:41,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:41,936 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 11:23:41,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601765816] [2019-10-22 11:23:41,937 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:41,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:23:41,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706730704] [2019-10-22 11:23:41,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:23:41,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:23:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:23:41,940 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2019-10-22 11:23:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:41,959 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-10-22 11:23:41,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:23:41,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-10-22 11:23:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:41,961 INFO L225 Difference]: With dead ends: 36 [2019-10-22 11:23:41,961 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 11:23:41,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:23:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 11:23:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-10-22 11:23:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:23:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-22 11:23:41,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2019-10-22 11:23:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:41,967 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-22 11:23:41,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:23:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-22 11:23:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:23:41,968 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:41,968 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:41,968 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1462003263, now seen corresponding path program 1 times [2019-10-22 11:23:41,969 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:41,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025860947] [2019-10-22 11:23:41,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:41,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:42,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025860947] [2019-10-22 11:23:42,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141797443] [2019-10-22 11:23:42,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:42,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:23:42,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:42,142 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:42,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [251152170] [2019-10-22 11:23:42,167 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 15 [2019-10-22 11:23:42,208 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:23:42,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:23:42,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:42,512 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 11:23:42,516 INFO L168 Benchmark]: Toolchain (without parser) took 2129.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 937.8 MB in the beginning and 1.0 GB in the end (delta: -78.4 MB). Peak memory consumption was 55.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:42,516 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:42,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 937.8 MB in the beginning and 1.1 GB in the end (delta: -163.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:42,517 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:42,518 INFO L168 Benchmark]: Boogie Preprocessor took 56.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:42,518 INFO L168 Benchmark]: RCFGBuilder took 381.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:42,519 INFO L168 Benchmark]: TraceAbstraction took 984.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 55.4 MB). Peak memory consumption was 55.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:42,521 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 645.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 937.8 MB in the beginning and 1.1 GB in the end (delta: -163.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 381.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 984.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 55.4 MB). Peak memory consumption was 55.4 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 11:23:44,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:44,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:44,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:44,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:44,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:44,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:44,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:44,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:44,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:44,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:44,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:44,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:44,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:44,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:44,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:44,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:44,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:44,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:44,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:44,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:44,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:44,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:44,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:44,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:44,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:44,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:44,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:44,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:44,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:44,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:44,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:44,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:44,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:44,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:44,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:44,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:44,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:44,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:44,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:44,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:44,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:23:44,572 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:44,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:44,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:44,573 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:44,574 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:44,574 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:44,574 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:44,574 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:44,574 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:44,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:44,575 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:23:44,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:23:44,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:23:44,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:44,577 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:23:44,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:44,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:44,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:44,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:44,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:44,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:44,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:44,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:44,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:44,579 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:23:44,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:23:44,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:44,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:44,579 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_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 -> 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 [2019-10-22 11:23:44,605 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:44,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:44,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:44,624 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:44,624 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:44,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-10-22 11:23:44,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/087d2ff5b/4676bffd6c0e4bd3949d004feb9c3a3b/FLAGadea5efe9 [2019-10-22 11:23:45,139 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:45,139 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-10-22 11:23:45,152 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/087d2ff5b/4676bffd6c0e4bd3949d004feb9c3a3b/FLAGadea5efe9 [2019-10-22 11:23:45,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/data/087d2ff5b/4676bffd6c0e4bd3949d004feb9c3a3b [2019-10-22 11:23:45,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:45,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:45,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:45,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:45,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:45,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4984c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45, skipping insertion in model container [2019-10-22 11:23:45,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,476 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:45,511 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:45,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:45,842 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:45,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:45,948 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:45,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45 WrapperNode [2019-10-22 11:23:45,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:45,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:45,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:45,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:45,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:45,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:45,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:45,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:45,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:46,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:46,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:46,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:46,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:46,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:23:46,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:23:46,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:23:46,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:23:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:23:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:23:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-22 11:23:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:46,407 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:46,407 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-10-22 11:23:46,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:46 BoogieIcfgContainer [2019-10-22 11:23:46,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:46,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:46,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:46,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:45" (1/3) ... [2019-10-22 11:23:46,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241c3205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:46, skipping insertion in model container [2019-10-22 11:23:46,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (2/3) ... [2019-10-22 11:23:46,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241c3205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:46, skipping insertion in model container [2019-10-22 11:23:46,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:46" (3/3) ... [2019-10-22 11:23:46,415 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-10-22 11:23:46,422 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:46,428 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:46,437 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:46,457 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:46,457 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:46,457 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:46,457 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:46,457 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:46,457 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:46,458 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:46,458 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 11:23:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:23:46,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:46,475 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:46,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash -409317193, now seen corresponding path program 1 times [2019-10-22 11:23:46,489 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:46,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [867551424] [2019-10-22 11:23:46,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:46,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:23:46,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:46,600 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 11:23:46,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:46,603 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 11:23:46,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867551424] [2019-10-22 11:23:46,604 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:46,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:23:46,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254832358] [2019-10-22 11:23:46,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:23:46,611 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:23:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:46,623 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-10-22 11:23:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:46,639 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2019-10-22 11:23:46,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:23:46,640 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-22 11:23:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:46,650 INFO L225 Difference]: With dead ends: 38 [2019-10-22 11:23:46,650 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:23:46,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:23:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 11:23:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:23:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 11:23:46,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2019-10-22 11:23:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:46,685 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 11:23:46,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:23:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-22 11:23:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:23:46,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:46,687 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:46,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:46,887 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1724474201, now seen corresponding path program 1 times [2019-10-22 11:23:46,888 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:46,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [976741034] [2019-10-22 11:23:46,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:46,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:23:46,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:46,990 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 11:23:46,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:47,004 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 11:23:47,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [976741034] [2019-10-22 11:23:47,005 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:47,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:23:47,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905966491] [2019-10-22 11:23:47,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:23:47,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:23:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:23:47,008 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2019-10-22 11:23:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:47,039 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-10-22 11:23:47,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:23:47,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-10-22 11:23:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:47,041 INFO L225 Difference]: With dead ends: 37 [2019-10-22 11:23:47,041 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 11:23:47,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:23:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 11:23:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-22 11:23:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 11:23:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-22 11:23:47,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 9 [2019-10-22 11:23:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:47,048 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-22 11:23:47,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:23:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-22 11:23:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:23:47,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:47,049 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:47,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:47,250 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1187830695, now seen corresponding path program 1 times [2019-10-22 11:23:47,252 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:47,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1248898925] [2019-10-22 11:23:47,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/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 11:23:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:47,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:23:47,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:23:47,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:23:47,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248898925] [2019-10-22 11:23:47,465 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:47,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:23:47,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311792290] [2019-10-22 11:23:47,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:23:47,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:47,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:23:47,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:23:47,467 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-22 11:23:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:47,517 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-10-22 11:23:47,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:23:47,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-22 11:23:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:47,518 INFO L225 Difference]: With dead ends: 36 [2019-10-22 11:23:47,519 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:23:47,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:23:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:23:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:23:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:23:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-22 11:23:47,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2019-10-22 11:23:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:47,526 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-22 11:23:47,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:23:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-22 11:23:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 11:23:47,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:47,527 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:47,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:47,728 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1475148025, now seen corresponding path program 1 times [2019-10-22 11:23:47,729 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:47,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [130128017] [2019-10-22 11:23:47,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:47,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 11:23:47,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:48,050 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-22 11:23:48,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,065 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,066 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-10-22 11:23:48,156 INFO L392 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 4=[|#memory_$Pointer$.base|]} [2019-10-22 11:23:48,161 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2019-10-22 11:23:48,162 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,168 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,172 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,173 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2019-10-22 11:23:48,174 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,176 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,176 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,176 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:4 [2019-10-22 11:23:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:23:48,191 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:48,234 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2019-10-22 11:23:48,235 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,247 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,248 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:23:48,248 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:23 [2019-10-22 11:23:48,395 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,395 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 135 [2019-10-22 11:23:48,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:48,444 INFO L496 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-10-22 11:23:48,591 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 18 [2019-10-22 11:23:48,591 INFO L567 ElimStorePlain]: treesize reduction 399, result has 5.7 percent of original size [2019-10-22 11:23:48,592 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-22 11:23:48,592 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:14 [2019-10-22 11:23:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:23:48,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130128017] [2019-10-22 11:23:48,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530761864] [2019-10-22 11:23:48,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:48,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:23:48,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:48,820 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-22 11:23:48,820 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,830 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,835 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-22 11:23:48,835 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,843 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,843 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2019-10-22 11:23:48,894 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-22 11:23:48,895 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,906 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,919 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-22 11:23:48,919 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,924 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:48,925 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:23:48,925 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2019-10-22 11:23:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 11:23:48,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:48,974 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2019-10-22 11:23:48,975 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-22 11:23:48,987 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-10-22 11:23:48,987 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-10-22 11:23:48,988 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-22 11:23:48,988 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-10-22 11:23:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 11:23:48,992 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-10-22 11:23:48,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [12, 9] total 21 [2019-10-22 11:23:48,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29700948] [2019-10-22 11:23:48,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:23:48,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:23:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:23:48,994 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2019-10-22 11:23:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:49,181 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-10-22 11:23:49,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:23:49,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-10-22 11:23:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:49,182 INFO L225 Difference]: With dead ends: 44 [2019-10-22 11:23:49,182 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:23:49,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:23:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:23:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:23:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:23:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-10-22 11:23:49,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2019-10-22 11:23:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:49,188 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-10-22 11:23:49,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:23:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-10-22 11:23:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 11:23:49,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:49,188 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:49,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:49,591 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash -919632451, now seen corresponding path program 1 times [2019-10-22 11:23:49,592 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:49,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [101081345] [2019-10-22 11:23:49,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba386897-4bb9-49c6-b9e1-3d8f2d71a2a6/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:49,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 11:23:49,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:49,781 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-22 11:23:49,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:49,795 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:49,799 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-22 11:23:49,800 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:23:49,811 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:49,812 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:23:49,812 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:3 [2019-10-22 11:23:49,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,901 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:49,901 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2019-10-22 11:23:49,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,904 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:23:49,921 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:49,922 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2019-10-22 11:23:49,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:49,925 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:23:49,975 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:23:50,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:50,176 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) 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 11:23:50,180 INFO L168 Benchmark]: Toolchain (without parser) took 4717.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 947.0 MB in the beginning and 853.0 MB in the end (delta: 93.9 MB). Peak memory consumption was 257.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:50,180 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:50,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -192.6 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:50,181 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:50,182 INFO L168 Benchmark]: Boogie Preprocessor took 32.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:50,182 INFO L168 Benchmark]: RCFGBuilder took 384.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:50,183 INFO L168 Benchmark]: TraceAbstraction took 3769.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 853.0 MB in the end (delta: 261.2 MB). Peak memory consumption was 261.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:50,185 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 484.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -192.6 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 384.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3769.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 853.0 MB in the end (delta: 261.2 MB). Peak memory consumption was 261.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...