./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.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_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 1b149b3cef099476d14a8b122afb66552d0406eb ....................................................................................................................................................................................................................................................................................................................................................................................................... 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_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 1b149b3cef099476d14a8b122afb66552d0406eb .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:22:32,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:32,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:32,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:32,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:32,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:32,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:32,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:32,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:32,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:32,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:32,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:32,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:32,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:32,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:32,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:32,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:32,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:32,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:32,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:32,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:32,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:32,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:32,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:32,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:32,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:32,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:32,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:32,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:32,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:32,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:32,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:32,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:32,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:32,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:32,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:32,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:32,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:32,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:32,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:32,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:32,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:22:32,062 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:32,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:32,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:32,063 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:32,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:32,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:32,065 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:32,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:32,065 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:32,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:32,066 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:32,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:32,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:32,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:32,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:32,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:32,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:32,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:32,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:32,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:32,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:32,068 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:32,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:32,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:32,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:32,069 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_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 -> 1b149b3cef099476d14a8b122afb66552d0406eb [2019-10-22 11:22:32,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:32,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:32,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:32,117 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:32,117 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:32,118 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:32,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/6c974d587/e45ce913a8af4655b2eea96c0781059d/FLAG2f6779479 [2019-10-22 11:22:32,543 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:32,543 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:32,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/6c974d587/e45ce913a8af4655b2eea96c0781059d/FLAG2f6779479 [2019-10-22 11:22:32,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/6c974d587/e45ce913a8af4655b2eea96c0781059d [2019-10-22 11:22:32,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:32,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:32,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:32,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:32,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:32,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:32" (1/1) ... [2019-10-22 11:22:32,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b40190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:32, skipping insertion in model container [2019-10-22 11:22:32,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:32" (1/1) ... [2019-10-22 11:22:32,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:32,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:33,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:33,101 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:33,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:33,185 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:33,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33 WrapperNode [2019-10-22 11:22:33,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:33,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:33,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:33,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:33,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:33,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:33,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:33,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:33,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... [2019-10-22 11:22:33,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:33,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:33,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:33,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:33,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 11:22:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:33,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:33,480 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:33,480 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:22:33,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:33 BoogieIcfgContainer [2019-10-22 11:22:33,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:33,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:33,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:33,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:33,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:32" (1/3) ... [2019-10-22 11:22:33,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a70ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:33, skipping insertion in model container [2019-10-22 11:22:33,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:33" (2/3) ... [2019-10-22 11:22:33,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a70ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:33, skipping insertion in model container [2019-10-22 11:22:33,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:33" (3/3) ... [2019-10-22 11:22:33,489 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:33,498 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:33,506 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:33,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:33,540 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:33,540 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:33,540 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:33,540 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:33,540 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:33,540 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:33,540 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:33,541 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:22:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:33,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,563 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:33,565 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-10-22 11:22:33,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:33,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266105295] [2019-10-22 11:22:33,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,701 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 11:22:33,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266105295] [2019-10-22 11:22:33,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:33,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:22:33,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5202615] [2019-10-22 11:22:33,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:22:33,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:22:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:33,725 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:22:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:33,743 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 11:22:33,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:22:33,745 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:22:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:33,756 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:22:33,756 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:22:33,761 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 11:22:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:22:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:22:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:22:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:22:33,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:22:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,799 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:22:33,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:22:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:22:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:33,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,800 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:33,800 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-10-22 11:22:33,801 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:33,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267397050] [2019-10-22 11:22:33,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,853 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 11:22:33,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267397050] [2019-10-22 11:22:33,854 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:33,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:22:33,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121800062] [2019-10-22 11:22:33,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:33,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:33,857 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-10-22 11:22:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:33,900 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-10-22 11:22:33,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:33,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:22:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:33,901 INFO L225 Difference]: With dead ends: 13 [2019-10-22 11:22:33,901 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:22:33,902 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 11:22:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:22:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 11:22:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:22:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:22:33,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:22:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,905 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:22:33,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:22:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:22:33,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,906 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:33,906 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-10-22 11:22:33,907 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:33,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202782880] [2019-10-22 11:22:33,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202782880] [2019-10-22 11:22:33,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:33,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:22:33,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019661985] [2019-10-22 11:22:33,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:22:33,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:22:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:22:33,932 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-10-22 11:22:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:33,949 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 11:22:33,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:22:33,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-10-22 11:22:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:33,951 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:22:33,951 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:22:33,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:22:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:22:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-10-22 11:22:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 11:22:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-10-22 11:22:33,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-10-22 11:22:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,954 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-10-22 11:22:33,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:22:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-10-22 11:22:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:22:33,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,955 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:33,955 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash -251232646, now seen corresponding path program 1 times [2019-10-22 11:22:33,956 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:33,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748475160] [2019-10-22 11:22:33,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:34,155 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 11:22:34,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748475160] [2019-10-22 11:22:34,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496354809] [2019-10-22 11:22:34,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 11:22:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:34,202 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:34,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:34,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:34,322 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 11:22:34,323 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:34,441 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 11:22:34,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [209402749] [2019-10-22 11:22:34,447 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 9 [2019-10-22 11:22:34,477 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:22:34,477 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:22:34,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:34,754 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 11:22:34,762 INFO L168 Benchmark]: Toolchain (without parser) took 1809.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.8 MB in the beginning and 1.0 GB in the end (delta: -91.0 MB). Peak memory consumption was 48.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,762 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:34,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,763 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.50 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 11:22:34,764 INFO L168 Benchmark]: Boogie Preprocessor took 26.71 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,764 INFO L168 Benchmark]: RCFGBuilder took 233.58 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,765 INFO L168 Benchmark]: TraceAbstraction took 1277.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.7 MB). Peak memory consumption was 79.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,777 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.71 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 233.58 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1277.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.7 MB). Peak memory consumption was 79.7 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 11:22:36,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:36,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:36,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:36,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:36,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:36,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:36,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:36,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:36,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:36,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:36,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:36,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:36,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:36,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:36,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:36,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:36,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:36,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:36,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:36,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:36,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:36,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:36,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:36,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:36,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:36,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:36,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:36,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:36,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:36,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:36,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:36,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:36,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:36,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:36,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:36,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:36,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:36,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:36,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:36,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:36,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:22:36,887 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:36,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:36,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:36,888 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:36,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:36,889 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:36,889 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:36,889 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:36,889 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:36,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:36,890 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:36,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:36,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:36,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:36,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:22:36,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:36,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:36,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:36,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:36,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:36,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:36,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:36,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:36,893 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_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 -> 1b149b3cef099476d14a8b122afb66552d0406eb [2019-10-22 11:22:36,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:36,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:36,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:36,933 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:36,933 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:36,934 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:36,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/c7fc8c497/947e461c6d5c478b8a801900abb05b8a/FLAG836ce0d98 [2019-10-22 11:22:37,371 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:37,372 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:37,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/c7fc8c497/947e461c6d5c478b8a801900abb05b8a/FLAG836ce0d98 [2019-10-22 11:22:37,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/data/c7fc8c497/947e461c6d5c478b8a801900abb05b8a [2019-10-22 11:22:37,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:37,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:37,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:37,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:37,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:37,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40101a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37, skipping insertion in model container [2019-10-22 11:22:37,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,414 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:37,429 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:37,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:37,604 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:37,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:37,630 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:37,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37 WrapperNode [2019-10-22 11:22:37,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:37,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:37,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:37,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:37,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:37,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:37,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:37,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:37,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... [2019-10-22 11:22:37,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:37,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:37,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:37,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:37,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/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 11:22:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:37,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:37,925 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:37,925 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:22:37,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:37 BoogieIcfgContainer [2019-10-22 11:22:37,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:37,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:37,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:37,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:37,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:37" (1/3) ... [2019-10-22 11:22:37,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7720587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:37, skipping insertion in model container [2019-10-22 11:22:37,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:37" (2/3) ... [2019-10-22 11:22:37,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7720587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:37, skipping insertion in model container [2019-10-22 11:22:37,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:37" (3/3) ... [2019-10-22 11:22:37,934 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-10-22 11:22:37,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:37,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:37,955 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:37,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:37,972 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:37,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:37,972 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:37,973 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:37,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:37,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:37,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:22:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:37,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:37,996 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:37,998 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-10-22 11:22:38,008 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:38,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1826908036] [2019-10-22 11:22:38,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:38,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:22:38,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:38,065 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 11:22:38,065 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:38,067 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 11:22:38,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826908036] [2019-10-22 11:22:38,069 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:38,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:22:38,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744191468] [2019-10-22 11:22:38,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:22:38,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:22:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:38,087 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:22:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:38,101 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 11:22:38,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:22:38,102 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:22:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:38,111 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:22:38,112 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:22:38,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:22:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:22:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:22:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:22:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:22:38,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:22:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:38,149 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:22:38,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:22:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:22:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:22:38,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:38,150 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:22:38,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:38,351 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-10-22 11:22:38,351 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:38,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [199457443] [2019-10-22 11:22:38,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:38,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:38,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:38,443 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 11:22:38,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:38,485 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 11:22:38,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [199457443] [2019-10-22 11:22:38,486 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:38,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:22:38,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440058138] [2019-10-22 11:22:38,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:22:38,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:22:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:38,488 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 5 states. [2019-10-22 11:22:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:38,522 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-10-22 11:22:38,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:38,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-10-22 11:22:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:38,523 INFO L225 Difference]: With dead ends: 13 [2019-10-22 11:22:38,524 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:22:38,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:22:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:22:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 11:22:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:22:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:22:38,528 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:22:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:38,528 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:22:38,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:22:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:22:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:22:38,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:38,529 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:38,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:38,730 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-10-22 11:22:38,730 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:38,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:22:38,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:38,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:22:38,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:38,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:38,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:22:38,784 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:38,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:22:38,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784970744] [2019-10-22 11:22:38,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:38,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:38,785 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-10-22 11:22:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:38,817 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-10-22 11:22:38,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:38,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 11:22:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:38,819 INFO L225 Difference]: With dead ends: 25 [2019-10-22 11:22:38,819 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 11:22:38,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 11:22:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-10-22 11:22:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-22 11:22:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-10-22 11:22:38,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2019-10-22 11:22:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:38,824 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-10-22 11:22:38,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-10-22 11:22:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:22:38,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:38,825 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:39,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:39,026 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash -251232646, now seen corresponding path program 1 times [2019-10-22 11:22:39,027 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:39,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [734697828] [2019-10-22 11:22:39,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:39,066 WARN L254 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:39,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:39,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:39,218 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 11:22:39,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:39,414 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 11:22:39,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [734697828] [2019-10-22 11:22:39,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518939582] [2019-10-22 11:22:39,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:39,434 WARN L254 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:39,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:39,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:39,466 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 11:22:39,466 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:39,476 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 11:22:39,480 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:39,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 11 [2019-10-22 11:22:39,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598193142] [2019-10-22 11:22:39,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 11:22:39,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 11:22:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:22:39,483 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 12 states. [2019-10-22 11:22:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:39,775 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-10-22 11:22:39,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 11:22:39,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2019-10-22 11:22:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:39,776 INFO L225 Difference]: With dead ends: 22 [2019-10-22 11:22:39,776 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 11:22:39,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:22:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 11:22:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-22 11:22:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 11:22:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-22 11:22:39,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-10-22 11:22:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:39,785 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-22 11:22:39,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 11:22:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-22 11:22:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:22:39,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:39,786 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:40,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:40,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2050208028, now seen corresponding path program 1 times [2019-10-22 11:22:40,188 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:40,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1987570288] [2019-10-22 11:22:40,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:40,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:40,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:40,252 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:40,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987570288] [2019-10-22 11:22:40,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502895477] [2019-10-22 11:22:40,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:40,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:40,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:40,316 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:40,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:40,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 7 [2019-10-22 11:22:40,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448573459] [2019-10-22 11:22:40,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:22:40,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:22:40,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:22:40,321 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-10-22 11:22:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:40,413 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-10-22 11:22:40,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:22:40,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-10-22 11:22:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:40,414 INFO L225 Difference]: With dead ends: 45 [2019-10-22 11:22:40,414 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 11:22:40,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:22:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 11:22:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2019-10-22 11:22:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 11:22:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-22 11:22:40,421 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 14 [2019-10-22 11:22:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:40,421 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-22 11:22:40,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:22:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-22 11:22:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:22:40,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:40,422 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 11:22:40,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:40,823 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2107466330, now seen corresponding path program 2 times [2019-10-22 11:22:40,824 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:40,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [695924907] [2019-10-22 11:22:40,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:40,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:40,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:40,875 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:40,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:41,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:41,086 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 11:22:41,087 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:41,663 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 11:22:41,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695924907] [2019-10-22 11:22:41,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186453663] [2019-10-22 11:22:41,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:41,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:41,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:41,691 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:22:41,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:41,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:41,763 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 11:22:41,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:41,773 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 11:22:41,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:41,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 19 [2019-10-22 11:22:41,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984368155] [2019-10-22 11:22:41,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 11:22:41,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 11:22:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-22 11:22:41,775 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 20 states. [2019-10-22 11:22:42,129 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-10-22 11:22:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:43,091 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-22 11:22:43,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 11:22:43,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-10-22 11:22:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:43,092 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:22:43,092 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:22:43,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2019-10-22 11:22:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:22:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-22 11:22:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 11:22:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-22 11:22:43,097 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2019-10-22 11:22:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:43,098 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-22 11:22:43,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 11:22:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-22 11:22:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 11:22:43,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:43,098 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:43,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:43,499 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1236497329, now seen corresponding path program 2 times [2019-10-22 11:22:43,500 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:43,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2004574562] [2019-10-22 11:22:43,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:43,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:43,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:22:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:43,600 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:22:43,600 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:22:43,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:43,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:43 BoogieIcfgContainer [2019-10-22 11:22:43,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:43,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:43,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:43,815 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:43,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:37" (3/4) ... [2019-10-22 11:22:43,817 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:22:43,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1e86eccb-dd1c-4daf-81f2-8d2406ce79bc/bin/utaipan/witness.graphml [2019-10-22 11:22:43,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:43,861 INFO L168 Benchmark]: Toolchain (without parser) took 6464.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 951.0 MB in the beginning and 1.2 GB in the end (delta: -211.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:43,861 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:43,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:43,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -202.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:43,862 INFO L168 Benchmark]: Boogie Preprocessor took 20.10 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 11:22:43,863 INFO L168 Benchmark]: RCFGBuilder took 193.85 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: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:43,863 INFO L168 Benchmark]: TraceAbstraction took 5887.49 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -39.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:43,864 INFO L168 Benchmark]: Witness Printer took 45.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:43,866 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.12 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 79.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -202.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.10 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 193.85 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: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5887.49 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -39.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * Witness Printer took 45.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. 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] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-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: 5.8s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 70 SDslu, 79 SDs, 0 SdLazy, 303 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 162 ConstructedInterpolants, 4 QuantifiedInterpolants, 13656 SizeOfPredicates, 32 NumberOfNonLiveVariables, 153 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 22/102 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...