./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01-1.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_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ................................................................................................................................................................................................................................................................................................................................................................ 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_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:22:54,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:54,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:55,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:55,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:55,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:55,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:55,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:55,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:55,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:55,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:55,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:55,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:55,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:55,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:55,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:55,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:55,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:55,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:55,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:55,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:55,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:55,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:55,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:55,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:55,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:55,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:55,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:55,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:55,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:55,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:55,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:55,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:55,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:55,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:55,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:55,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:55,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:55,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:55,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:55,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:55,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:22:55,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:55,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:55,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:55,048 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:55,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:55,048 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:55,048 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:55,048 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:55,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:55,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:55,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:55,049 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:55,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:55,050 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:55,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:55,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:55,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:55,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:55,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:55,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:55,051 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:55,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:55,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:55,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:55,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:55,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:55,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:55,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:55,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:55,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:55,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:55,053 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:55,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:55,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:55,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:55,054 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_213c39b9-91fa-443a-8d77-21207e328bfa/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-10-22 11:22:55,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:55,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:55,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:55,092 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:55,092 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:55,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/../../sv-benchmarks/c/loops/sum01-1.i [2019-10-22 11:22:55,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/3e5dc01d0/62e8b7270ec2432685155ee331a30500/FLAG9d5ec8c70 [2019-10-22 11:22:55,536 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:55,537 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/sv-benchmarks/c/loops/sum01-1.i [2019-10-22 11:22:55,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/3e5dc01d0/62e8b7270ec2432685155ee331a30500/FLAG9d5ec8c70 [2019-10-22 11:22:55,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/3e5dc01d0/62e8b7270ec2432685155ee331a30500 [2019-10-22 11:22:55,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:55,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:55,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:55,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:55,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:55,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:55" (1/1) ... [2019-10-22 11:22:55,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e190ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:55, skipping insertion in model container [2019-10-22 11:22:55,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:55" (1/1) ... [2019-10-22 11:22:55,957 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:55,969 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:56,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:56,106 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:56,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:56,196 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:56,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56 WrapperNode [2019-10-22 11:22:56,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:56,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:56,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:56,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:56,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:56,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:56,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:56,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:56,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... [2019-10-22 11:22:56,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:56,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:56,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:56,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:56,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:56,396 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:56,396 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:22:56,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:56 BoogieIcfgContainer [2019-10-22 11:22:56,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:56,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:56,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:56,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:56,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:55" (1/3) ... [2019-10-22 11:22:56,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28426516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:56, skipping insertion in model container [2019-10-22 11:22:56,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:56" (2/3) ... [2019-10-22 11:22:56,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28426516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:56, skipping insertion in model container [2019-10-22 11:22:56,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:56" (3/3) ... [2019-10-22 11:22:56,404 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-10-22 11:22:56,413 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:56,419 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:56,426 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:56,446 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:56,446 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:56,446 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:56,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:56,447 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:56,447 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:56,447 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:56,447 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:22:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:56,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:56,465 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:56,466 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-10-22 11:22:56,478 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:56,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896882299] [2019-10-22 11:22:56,479 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,479 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:56,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896882299] [2019-10-22 11:22:56,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:56,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:22:56,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785627921] [2019-10-22 11:22:56,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:22:56,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:56,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:22:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:56,582 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:22:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:56,592 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 11:22:56,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:22:56,594 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:22:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:56,602 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:22:56,602 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:22:56,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:22:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:22:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:22:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:22:56,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:22:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:56,630 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:22:56,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:22:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:22:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:56,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:56,631 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:56,631 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-10-22 11:22:56,632 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:56,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656174711] [2019-10-22 11:22:56,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:56,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656174711] [2019-10-22 11:22:56,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:56,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:22:56,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019054864] [2019-10-22 11:22:56,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:56,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:56,682 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-10-22 11:22:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:56,706 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-10-22 11:22:56,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:56,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:22:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:56,707 INFO L225 Difference]: With dead ends: 15 [2019-10-22 11:22:56,708 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:22:56,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:22:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 11:22:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 11:22:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-10-22 11:22:56,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-10-22 11:22:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:56,714 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-10-22 11:22:56,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-10-22 11:22:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:22:56,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:56,714 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:56,715 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-10-22 11:22:56,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:56,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972990371] [2019-10-22 11:22:56,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:56,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:57,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972990371] [2019-10-22 11:22:57,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672089120] [2019-10-22 11:22:57,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:57,032 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:57,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:57,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:57,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:57,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2084442426] [2019-10-22 11:22:57,310 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 9 [2019-10-22 11:22:57,349 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:22:57,349 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:22:57,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:57,640 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:22:57,645 INFO L168 Benchmark]: Toolchain (without parser) took 1701.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.4 MB in the beginning and 1.0 GB in the end (delta: -63.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,646 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:57,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -173.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,656 INFO L168 Benchmark]: Boogie Preprocessor took 18.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,657 INFO L168 Benchmark]: RCFGBuilder took 153.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,657 INFO L168 Benchmark]: TraceAbstraction took 1244.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 84.4 MB). Peak memory consumption was 84.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:57,662 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 253.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -173.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 153.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1244.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 84.4 MB). Peak memory consumption was 84.4 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 11:22:59,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:59,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:59,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:59,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:59,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:59,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:59,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:59,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:59,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:59,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:59,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:59,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:59,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:59,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:59,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:59,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:59,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:59,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:59,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:59,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:59,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:59,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:59,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:59,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:59,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:59,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:59,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:59,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:59,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:59,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:59,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:59,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:59,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:59,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:59,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:59,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:59,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:59,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:59,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:59,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:59,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:22:59,762 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:59,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:59,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:59,763 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:59,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:59,764 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:59,764 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:59,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:59,764 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:59,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:59,765 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:59,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:59,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:59,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:22:59,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:59,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:59,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:59,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:59,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:22:59,768 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:22:59,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:59,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:59,769 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_213c39b9-91fa-443a-8d77-21207e328bfa/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-10-22 11:22:59,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:59,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:59,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:59,814 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:59,814 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:59,815 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/../../sv-benchmarks/c/loops/sum01-1.i [2019-10-22 11:22:59,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/94b627968/1541107b3ed946288616f66cb3f4cd32/FLAGe9a85cf08 [2019-10-22 11:23:00,259 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:00,260 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/sv-benchmarks/c/loops/sum01-1.i [2019-10-22 11:23:00,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/94b627968/1541107b3ed946288616f66cb3f4cd32/FLAGe9a85cf08 [2019-10-22 11:23:00,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/data/94b627968/1541107b3ed946288616f66cb3f4cd32 [2019-10-22 11:23:00,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:00,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:00,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:00,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:00,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:00,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9f6cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00, skipping insertion in model container [2019-10-22 11:23:00,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,734 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:00,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:00,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:00,883 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:00,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:00,909 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:00,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00 WrapperNode [2019-10-22 11:23:00,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:00,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:00,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:00,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:00,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:00,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:00,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:00,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:00,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:00,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:01,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:01,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:01,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... [2019-10-22 11:23:01,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:01,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:01,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:01,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:01,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 11:23:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:01,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:01,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:01,197 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:23:01,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:01 BoogieIcfgContainer [2019-10-22 11:23:01,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:01,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:01,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:01,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:01,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:00" (1/3) ... [2019-10-22 11:23:01,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150f7c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:01, skipping insertion in model container [2019-10-22 11:23:01,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:00" (2/3) ... [2019-10-22 11:23:01,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150f7c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:01, skipping insertion in model container [2019-10-22 11:23:01,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:01" (3/3) ... [2019-10-22 11:23:01,205 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-10-22 11:23:01,214 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:01,219 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:01,227 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:01,248 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:01,248 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:01,248 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:01,248 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:01,248 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:01,249 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:01,249 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:01,249 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:23:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:23:01,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:01,267 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:23:01,269 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-10-22 11:23:01,281 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:01,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1952019019] [2019-10-22 11:23:01,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 11:23:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:01,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:23:01,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:01,353 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 11:23:01,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:01,364 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 11:23:01,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952019019] [2019-10-22 11:23:01,366 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:01,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:23:01,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163292170] [2019-10-22 11:23:01,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:23:01,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:23:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:01,388 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:23:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:01,403 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 11:23:01,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:23:01,404 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:23:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:01,414 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:23:01,414 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:23:01,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:23:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:23:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:23:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:23:01,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:23:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:01,441 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:23:01,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:23:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:23:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:23:01,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:01,442 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:23:01,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:01,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-10-22 11:23:01,643 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:01,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1682861487] [2019-10-22 11:23:01,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 11:23:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:01,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:23:01,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:01,707 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 11:23:01,707 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:01,739 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 11:23:01,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682861487] [2019-10-22 11:23:01,740 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:01,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:23:01,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764540871] [2019-10-22 11:23:01,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:23:01,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:23:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:23:01,745 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 5 states. [2019-10-22 11:23:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:01,777 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-10-22 11:23:01,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:23:01,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-10-22 11:23:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:01,778 INFO L225 Difference]: With dead ends: 15 [2019-10-22 11:23:01,778 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:23:01,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:23:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:23:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 11:23:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 11:23:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-10-22 11:23:01,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-10-22 11:23:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:01,782 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-10-22 11:23:01,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:23:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-10-22 11:23:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:23:01,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:01,782 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:01,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:01,983 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-10-22 11:23:01,984 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:01,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2033961342] [2019-10-22 11:23:01,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/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 11:23:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:02,028 WARN L254 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:23:02,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:02,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:02,213 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 11:23:02,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:02,492 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 11:23:02,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033961342] [2019-10-22 11:23:02,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149928681] [2019-10-22 11:23:02,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:02,531 WARN L254 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:23:02,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:02,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:02,560 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 11:23:02,560 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:02,566 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 11:23:02,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:23:02,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 13 [2019-10-22 11:23:02,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813047731] [2019-10-22 11:23:02,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 11:23:02,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 11:23:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:23:02,569 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 14 states. [2019-10-22 11:23:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:03,028 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2019-10-22 11:23:03,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:23:03,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-10-22 11:23:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:03,030 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:23:03,030 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 11:23:03,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2019-10-22 11:23:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 11:23:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-22 11:23:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 11:23:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-22 11:23:03,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-10-22 11:23:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:03,037 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-22 11:23:03,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 11:23:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-22 11:23:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:23:03,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:03,040 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 11:23:03,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:03,441 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2019-10-22 11:23:03,442 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:03,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [598193142] [2019-10-22 11:23:03,442 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:03,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:23:03,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:23:03,492 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:23:03,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:03,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:03,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:04,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598193142] [2019-10-22 11:23:04,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950664503] [2019-10-22 11:23:04,682 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:04,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:23:04,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:23:04,715 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:23:04,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:04,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:04,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:04,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:23:04,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13] total 25 [2019-10-22 11:23:04,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918593350] [2019-10-22 11:23:04,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 11:23:04,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 11:23:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2019-10-22 11:23:04,800 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 26 states. [2019-10-22 11:23:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:06,533 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-22 11:23:06,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 11:23:06,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 14 [2019-10-22 11:23:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:06,535 INFO L225 Difference]: With dead ends: 41 [2019-10-22 11:23:06,535 INFO L226 Difference]: Without dead ends: 30 [2019-10-22 11:23:06,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2019-10-22 11:23:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-22 11:23:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-10-22 11:23:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 11:23:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-22 11:23:06,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2019-10-22 11:23:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:06,541 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-22 11:23:06,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 11:23:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-22 11:23:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 11:23:06,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:06,542 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:06,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:06,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2019-10-22 11:23:06,944 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:06,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1929980577] [2019-10-22 11:23:06,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:06,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:23:06,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:07,029 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:07,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929980577] [2019-10-22 11:23:07,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950337189] [2019-10-22 11:23:07,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:07,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:23:07,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:07,149 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:07,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:23:07,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7] total 15 [2019-10-22 11:23:07,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643191829] [2019-10-22 11:23:07,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 11:23:07,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 11:23:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:23:07,327 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 16 states. [2019-10-22 11:23:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:07,839 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-10-22 11:23:07,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:23:07,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-10-22 11:23:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:07,840 INFO L225 Difference]: With dead ends: 62 [2019-10-22 11:23:07,840 INFO L226 Difference]: Without dead ends: 55 [2019-10-22 11:23:07,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:23:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-22 11:23:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-10-22 11:23:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 11:23:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-22 11:23:07,847 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 20 [2019-10-22 11:23:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:07,847 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-22 11:23:07,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 11:23:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-22 11:23:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-22 11:23:07,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:07,848 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1] [2019-10-22 11:23:08,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:08,249 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -447973732, now seen corresponding path program 3 times [2019-10-22 11:23:08,250 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:08,250 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [151305614] [2019-10-22 11:23:08,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:08,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 11:23:08,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:23:08,331 WARN L254 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:23:08,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:08,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:08,839 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151305614] [2019-10-22 11:23:10,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448698462] [2019-10-22 11:23:10,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:10,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 11:23:10,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:23:10,849 WARN L254 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:23:10,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:10,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:23:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,932 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,947 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:23:10,947 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20] total 39 [2019-10-22 11:23:10,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300846738] [2019-10-22 11:23:10,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-22 11:23:10,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-22 11:23:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 11:23:10,949 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 40 states. [2019-10-22 11:23:13,364 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-10-22 11:23:13,840 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-10-22 11:23:14,378 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2019-10-22 11:23:14,877 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-10-22 11:23:15,286 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2019-10-22 11:23:15,659 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-10-22 11:23:15,989 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-10-22 11:23:16,382 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2019-10-22 11:23:16,694 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-10-22 11:23:17,067 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-10-22 11:23:17,386 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-10-22 11:23:17,729 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-10-22 11:23:18,144 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2019-10-22 11:23:18,464 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-22 11:23:18,803 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2019-10-22 11:23:19,089 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-10-22 11:23:19,698 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2019-10-22 11:23:20,206 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2019-10-22 11:23:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:22,029 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2019-10-22 11:23:22,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-22 11:23:22,029 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 26 [2019-10-22 11:23:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:22,030 INFO L225 Difference]: With dead ends: 84 [2019-10-22 11:23:22,030 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 11:23:22,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1193, Invalid=6639, Unknown=0, NotChecked=0, Total=7832 [2019-10-22 11:23:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 11:23:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-10-22 11:23:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-22 11:23:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2019-10-22 11:23:22,041 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 26 [2019-10-22 11:23:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:22,041 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2019-10-22 11:23:22,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-22 11:23:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2019-10-22 11:23:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 11:23:22,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:22,042 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:22,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:22,443 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 2 times [2019-10-22 11:23:22,444 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:22,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [59652324] [2019-10-22 11:23:22,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:22,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:23:22,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:23:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:22,630 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:23:22,630 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:23:22,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:22,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:23:22 BoogieIcfgContainer [2019-10-22 11:23:22,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:23:22,853 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:23:22,853 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:23:22,854 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:23:22,854 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:01" (3/4) ... [2019-10-22 11:23:22,855 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:23:22,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_213c39b9-91fa-443a-8d77-21207e328bfa/bin/utaipan/witness.graphml [2019-10-22 11:23:22,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:23:22,894 INFO L168 Benchmark]: Toolchain (without parser) took 22174.49 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 303.0 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -123.2 MB). Peak memory consumption was 179.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:22,894 INFO L168 Benchmark]: CDTParser took 0.19 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 11:23:22,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.52 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:22,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:22,895 INFO L168 Benchmark]: Boogie Preprocessor took 14.68 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 11:23:22,895 INFO L168 Benchmark]: RCFGBuilder took 192.09 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: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:22,896 INFO L168 Benchmark]: TraceAbstraction took 21654.01 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 157.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 206.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:22,896 INFO L168 Benchmark]: Witness Printer took 39.22 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:22,898 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 189.52 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 80.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.68 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 192.09 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: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21654.01 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 157.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 206.5 MB. Max. memory is 11.5 GB. * Witness Printer took 39.22 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 21.6s, OverallIterations: 7, TraceHistogramMax: 10, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 261 SDslu, 146 SDs, 0 SdLazy, 1037 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 165 SyntacticMatches, 16 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 25 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 6 QuantifiedInterpolants, 55719 SizeOfPredicates, 43 NumberOfNonLiveVariables, 226 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 36/472 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...