./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 ............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:48:26,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:48:26,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:48:26,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:48:26,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:48:26,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:48:26,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:48:26,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:48:26,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:48:26,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:48:26,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:48:26,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:48:26,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:48:26,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:48:26,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:48:26,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:48:26,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:48:26,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:48:26,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:48:26,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:48:26,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:48:26,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:48:26,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:48:26,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:48:26,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:48:26,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:48:26,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:48:26,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:48:26,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:48:27,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:48:27,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:48:27,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:48:27,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:48:27,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:48:27,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:48:27,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:48:27,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:48:27,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:48:27,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:48:27,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:48:27,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:48:27,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:48:27,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:48:27,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:48:27,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:48:27,060 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:48:27,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:48:27,060 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:48:27,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:48:27,061 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:48:27,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:48:27,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:48:27,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:48:27,062 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:48:27,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:48:27,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:48:27,062 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:48:27,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:48:27,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:48:27,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:48:27,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:48:27,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:48:27,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:48:27,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:48:27,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:48:27,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:48:27,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:48:27,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:48:27,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:48:27,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:48:27,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:48:27,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:48:27,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:48:27,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:48:27,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:48:27,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:48:27,067 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:48:27,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:48:27,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:48:27,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:48:27,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:48:27,068 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2021-10-16 02:48:27,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:48:27,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:48:27,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:48:27,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:48:27,430 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:48:27,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-16 02:48:27,517 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/1cecb6ddd/79adf384c3cb4e128bb3219a1d7a5790/FLAGff2087bf2 [2021-10-16 02:48:28,126 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:48:28,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i [2021-10-16 02:48:28,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/1cecb6ddd/79adf384c3cb4e128bb3219a1d7a5790/FLAGff2087bf2 [2021-10-16 02:48:28,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/1cecb6ddd/79adf384c3cb4e128bb3219a1d7a5790 [2021-10-16 02:48:28,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:48:28,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:48:28,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:48:28,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:48:28,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:48:28,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264a20cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28, skipping insertion in model container [2021-10-16 02:48:28,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:48:28,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:48:28,776 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-16 02:48:28,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:48:28,789 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:48:28,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-16 02:48:28,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:48:28,884 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:48:28,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28 WrapperNode [2021-10-16 02:48:28,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:48:28,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:48:28,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:48:28,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:48:28,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:48:28,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:48:28,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:48:28,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:48:28,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:48:28,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:48:28,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:48:28,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:48:28,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (1/1) ... [2021-10-16 02:48:28,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:48:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:29,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:48:29,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:48:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:48:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:48:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:48:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:48:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:48:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:48:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:48:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:48:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:48:29,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:48:29,388 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:48:29,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:48:29 BoogieIcfgContainer [2021-10-16 02:48:29,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:48:29,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:48:29,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:48:29,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:48:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:48:28" (1/3) ... [2021-10-16 02:48:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d25e316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:48:29, skipping insertion in model container [2021-10-16 02:48:29,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:28" (2/3) ... [2021-10-16 02:48:29,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d25e316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:48:29, skipping insertion in model container [2021-10-16 02:48:29,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:48:29" (3/3) ... [2021-10-16 02:48:29,399 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-16 02:48:29,404 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:48:29,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:48:29,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:48:29,468 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:48:29,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:48:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:48:29,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:29,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:29,489 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1471909019, now seen corresponding path program 1 times [2021-10-16 02:48:29,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:48:29,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909676127] [2021-10-16 02:48:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:29,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:48:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:29,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:48:29,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909676127] [2021-10-16 02:48:29,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909676127] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:29,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:48:29,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:48:29,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181606012] [2021-10-16 02:48:29,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:48:29,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:48:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:48:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:48:29,718 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:29,733 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-10-16 02:48:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:48:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:48:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:29,744 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:48:29,745 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:48:29,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:48:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:48:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:48:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 02:48:29,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-10-16 02:48:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:29,785 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 02:48:29,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 02:48:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:48:29,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:29,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:29,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:48:29,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1172823090, now seen corresponding path program 1 times [2021-10-16 02:48:29,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:48:29,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714858436] [2021-10-16 02:48:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:29,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:48:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:29,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:48:29,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714858436] [2021-10-16 02:48:29,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714858436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:29,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:48:29,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:48:29,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059210332] [2021-10-16 02:48:29,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:48:29,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:48:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:48:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:48:29,975 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:30,087 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-16 02:48:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:48:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:48:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:30,089 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:48:30,089 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:48:30,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:48:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:48:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-10-16 02:48:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-16 02:48:30,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-10-16 02:48:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:30,095 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-16 02:48:30,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-16 02:48:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:48:30,096 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:30,096 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:30,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:48:30,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash 18528601, now seen corresponding path program 1 times [2021-10-16 02:48:30,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:48:30,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324593930] [2021-10-16 02:48:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:30,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:48:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:30,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:48:30,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324593930] [2021-10-16 02:48:30,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324593930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:48:30,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369760749] [2021-10-16 02:48:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:30,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:30,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:30,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:48:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:48:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:30,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:30,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-16 02:48:30,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-16 02:48:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:30,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-16 02:48:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:30,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369760749] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:30,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173660039] [2021-10-16 02:48:30,898 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-16 02:48:30,899 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:48:30,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:48:30,922 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:48:30,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:48:30,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:30,970 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:48:30,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:30,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:48:30,972 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:48:30,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:30,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:48:30,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-16 02:48:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:30,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:48:31,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:31,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:48:31,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:31,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:48:31,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:48:31,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:48:31,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:31,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:31,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-16 02:48:31,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:48:31,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:119 [2021-10-16 02:48:31,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:31,242 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_15| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:48:31,245 INFO L168 Benchmark]: Toolchain (without parser) took 2834.70 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 78.0 MB in the beginning and 96.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:48:31,245 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 109.1 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:48:31,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.68 ms. Allocated memory is still 109.1 MB. Free memory was 78.0 MB in the beginning and 77.5 MB in the end (delta: 478.6 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:48:31,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.87 ms. Allocated memory is still 109.1 MB. Free memory was 77.5 MB in the beginning and 75.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:48:31,247 INFO L168 Benchmark]: Boogie Preprocessor took 37.58 ms. Allocated memory is still 109.1 MB. Free memory was 75.8 MB in the beginning and 74.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:48:31,248 INFO L168 Benchmark]: RCFGBuilder took 402.61 ms. Allocated memory is still 109.1 MB. Free memory was 74.1 MB in the beginning and 62.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:48:31,248 INFO L168 Benchmark]: TraceAbstraction took 1851.84 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 61.5 MB in the beginning and 96.4 MB in the end (delta: -34.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:48:31,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 109.1 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.68 ms. Allocated memory is still 109.1 MB. Free memory was 78.0 MB in the beginning and 77.5 MB in the end (delta: 478.6 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.87 ms. Allocated memory is still 109.1 MB. Free memory was 77.5 MB in the beginning and 75.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.58 ms. Allocated memory is still 109.1 MB. Free memory was 75.8 MB in the beginning and 74.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 402.61 ms. Allocated memory is still 109.1 MB. Free memory was 74.1 MB in the beginning and 62.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1851.84 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 61.5 MB in the beginning and 96.4 MB in the end (delta: -34.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_15| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_15|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:48:31,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:48:33,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:48:33,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:48:33,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:48:33,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:48:33,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:48:33,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:48:33,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:48:33,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:48:33,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:48:33,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:48:33,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:48:33,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:48:33,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:48:33,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:48:33,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:48:33,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:48:33,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:48:33,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:48:33,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:48:33,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:48:33,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:48:33,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:48:33,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:48:33,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:48:33,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:48:33,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:48:33,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:48:33,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:48:33,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:48:33,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:48:33,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:48:33,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:48:33,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:48:33,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:48:33,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:48:33,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:48:33,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:48:33,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:48:33,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:48:33,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:48:33,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:48:34,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:48:34,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:48:34,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:48:34,007 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:48:34,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:48:34,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:48:34,008 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:48:34,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:48:34,009 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:48:34,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:48:34,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:48:34,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:48:34,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:48:34,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:48:34,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:48:34,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:48:34,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:48:34,013 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:48:34,013 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:48:34,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:48:34,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:48:34,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:48:34,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:48:34,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:48:34,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:48:34,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:48:34,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:48:34,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:48:34,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:48:34,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:48:34,016 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:48:34,016 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:34,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:48:34,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:48:34,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:48:34,018 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2021-10-16 02:48:34,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:48:34,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:48:34,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:48:34,475 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:48:34,476 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:48:34,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-16 02:48:34,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/156c9e87e/8db5a0510a404a6cb84466fa4802d988/FLAG01779e26c [2021-10-16 02:48:35,289 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:48:35,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i [2021-10-16 02:48:35,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/156c9e87e/8db5a0510a404a6cb84466fa4802d988/FLAG01779e26c [2021-10-16 02:48:35,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/data/156c9e87e/8db5a0510a404a6cb84466fa4802d988 [2021-10-16 02:48:35,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:48:35,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:48:35,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:48:35,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:48:35,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:48:35,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:48:35" (1/1) ... [2021-10-16 02:48:35,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71542261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:35, skipping insertion in model container [2021-10-16 02:48:35,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:48:35" (1/1) ... [2021-10-16 02:48:35,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:48:35,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:48:35,944 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-16 02:48:35,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:48:35,971 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:48:36,025 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-16 02:48:36,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:48:36,082 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:48:36,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36 WrapperNode [2021-10-16 02:48:36,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:48:36,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:48:36,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:48:36,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:48:36,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:48:36,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:48:36,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:48:36,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:48:36,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:48:36,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:48:36,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:48:36,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:48:36,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (1/1) ... [2021-10-16 02:48:36,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:48:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:36,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:48:36,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:48:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:48:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:48:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:48:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:48:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:48:36,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:48:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:48:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:48:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:48:36,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:48:36,640 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:48:36,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:48:36 BoogieIcfgContainer [2021-10-16 02:48:36,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:48:36,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:48:36,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:48:36,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:48:36,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:48:35" (1/3) ... [2021-10-16 02:48:36,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656b46ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:48:36, skipping insertion in model container [2021-10-16 02:48:36,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:48:36" (2/3) ... [2021-10-16 02:48:36,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656b46ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:48:36, skipping insertion in model container [2021-10-16 02:48:36,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:48:36" (3/3) ... [2021-10-16 02:48:36,650 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-16 02:48:36,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:48:36,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:48:36,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:48:36,709 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:48:36,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:48:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:48:36,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:36,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:36,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2102156727, now seen corresponding path program 1 times [2021-10-16 02:48:36,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:36,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362353636] [2021-10-16 02:48:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:36,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:36,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:48:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:48:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:37,081 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 02:48:37,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-16 02:48:37,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:48:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:37,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:37,248 INFO L354 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2021-10-16 02:48:37,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2021-10-16 02:48:37,272 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-10-16 02:48:37,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-10-16 02:48:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:37,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:37,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362353636] [2021-10-16 02:48:37,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362353636] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:37,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:48:37,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 02:48:37,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143164128] [2021-10-16 02:48:37,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:48:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:48:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:48:37,356 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:37,553 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-10-16 02:48:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:48:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:48:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:37,565 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:48:37,565 INFO L226 Difference]: Without dead ends: 25 [2021-10-16 02:48:37,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:48:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-16 02:48:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-10-16 02:48:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-16 02:48:37,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2021-10-16 02:48:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:37,601 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-16 02:48:37,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-16 02:48:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:48:37,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:37,603 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:37,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:48:37,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 437717459, now seen corresponding path program 1 times [2021-10-16 02:48:37,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:37,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553134508] [2021-10-16 02:48:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:37,831 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:37,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:37,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:48:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:48:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:48:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:48:38,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-16 02:48:38,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-16 02:48:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-16 02:48:38,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:38,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:38,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553134508] [2021-10-16 02:48:38,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553134508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:38,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540768738] [2021-10-16 02:48:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:38,261 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:38,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:38,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-16 02:48:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:38,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:48:38,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:38,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:38,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-16 02:48:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-16 02:48:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:38,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-16 02:48:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540768738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:38,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003013260] [2021-10-16 02:48:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:38,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:38,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:48:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:48:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:38,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:38,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-16 02:48:38,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-16 02:48:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:38,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:39,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-16 02:48:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:39,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003013260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:39,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:48:39,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 6, 5] total 8 [2021-10-16 02:48:39,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247131567] [2021-10-16 02:48:39,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:48:39,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:48:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:48:39,071 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:39,269 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-16 02:48:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:48:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:48:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:39,270 INFO L225 Difference]: With dead ends: 31 [2021-10-16 02:48:39,270 INFO L226 Difference]: Without dead ends: 21 [2021-10-16 02:48:39,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:48:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-16 02:48:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-16 02:48:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-16 02:48:39,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-10-16 02:48:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:39,275 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-16 02:48:39,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-16 02:48:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:48:39,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:39,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:39,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:39,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-10-16 02:48:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:39,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:39,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:48:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1803058100, now seen corresponding path program 1 times [2021-10-16 02:48:39,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:39,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233153625] [2021-10-16 02:48:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:39,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:39,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:48:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:48:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:40,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:40,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:48:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 02:48:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:40,200 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 02:48:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 02:48:40,280 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-10-16 02:48:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-10-16 02:48:40,353 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:48:40,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-16 02:48:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:40,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:40,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:40,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:48:44,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:44,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 02:48:48,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1423 treesize of output 1407 [2021-10-16 02:48:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:52,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:52,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233153625] [2021-10-16 02:48:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233153625] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:52,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101020334] [2021-10-16 02:48:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:52,663 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:52,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:52,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:48:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:48:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:52,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:48:53,090 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:48:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 02:48:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:48:53,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 02:48:53,371 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-10-16 02:48:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-10-16 02:48:53,460 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:48:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-16 02:48:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:53,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:53,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:53,494 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:48:59,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:48:59,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 02:49:02,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2816 treesize of output 2784 [2021-10-16 02:49:03,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:49:03,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854612671] [2021-10-16 02:49:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:03,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:03,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:49:03,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:49:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:49:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:03,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:03,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:49:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 02:49:03,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:49:03,428 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 02:49:03,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 02:49:03,506 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-10-16 02:49:03,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-10-16 02:49:03,569 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:49:03,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-16 02:49:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:03,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:03,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:49:09,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:09,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 02:49:11,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_46 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_6)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_46 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_46 (_ bv4 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-16 02:49:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2738 treesize of output 2706 [2021-10-16 02:49:11,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:49:11,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:49:11,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-16 02:49:11,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024253824] [2021-10-16 02:49:11,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:49:11,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:49:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:49:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=5, NotChecked=30, Total=306 [2021-10-16 02:49:11,981 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:22,280 WARN L207 SmtUtils]: Spent 10.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-10-16 02:49:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:49:27,730 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-16 02:49:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:49:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:49:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:49:27,732 INFO L225 Difference]: With dead ends: 28 [2021-10-16 02:49:27,732 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:49:27,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 37092.5ms TimeCoverageRelationStatistics Valid=82, Invalid=337, Unknown=5, NotChecked=38, Total=462 [2021-10-16 02:49:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:49:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-10-16 02:49:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-16 02:49:27,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-10-16 02:49:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:49:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-16 02:49:27,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-16 02:49:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:49:27,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:27,741 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:49:27,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-16 02:49:27,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 02:49:28,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-16 02:49:28,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:28,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:49:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2038046946, now seen corresponding path program 1 times [2021-10-16 02:49:28,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:49:28,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89622217] [2021-10-16 02:49:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:28,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:49:28,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:49:28,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:49:28,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:49:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:28,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:49:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:28,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:28,591 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:49:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 02:49:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 02:49:28,806 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-16 02:49:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 145 [2021-10-16 02:49:28,846 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-16 02:49:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 118 [2021-10-16 02:49:28,888 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-10-16 02:49:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 127 [2021-10-16 02:49:28,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:28,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-16 02:49:28,954 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-16 02:49:28,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 82 [2021-10-16 02:49:29,120 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-10-16 02:49:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 51 [2021-10-16 02:49:29,132 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-16 02:49:29,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-10-16 02:49:29,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:49:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:29,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:29,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-16 02:49:29,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:29,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-16 02:49:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 295 [2021-10-16 02:49:29,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:29,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-16 02:49:29,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 265 [2021-10-16 02:49:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 146 [2021-10-16 02:49:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:49:29,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:49:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-10-16 02:49:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:31,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:49:31,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89622217] [2021-10-16 02:49:31,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89622217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:31,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641512227] [2021-10-16 02:49:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:31,877 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:49:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:49:31,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:49:31,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:49:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:49:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:32,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:49:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-16 02:49:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 02:49:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:49:32,649 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-16 02:49:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 132 [2021-10-16 02:49:32,700 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 02:49:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 109 [2021-10-16 02:49:32,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:32,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-16 02:49:32,749 INFO L354 Elim1Store]: treesize reduction 94, result has 16.8 percent of original size [2021-10-16 02:49:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 96 [2021-10-16 02:49:32,766 INFO L354 Elim1Store]: treesize reduction 59, result has 20.3 percent of original size [2021-10-16 02:49:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 65 [2021-10-16 02:49:32,931 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-16 02:49:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 52 [2021-10-16 02:49:32,937 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:49:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-10-16 02:49:33,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:49:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:33,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:33,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:33,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-16 02:49:33,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:33,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-16 02:49:33,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 740 treesize of output 662 [2021-10-16 02:49:33,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:33,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 592 [2021-10-16 02:49:33,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 842 treesize of output 818 [2021-10-16 02:49:34,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 193 [2021-10-16 02:49:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641512227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146792336] [2021-10-16 02:49:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:37,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:37,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:49:37,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:49:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:49:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:37,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:49:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 02:49:37,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 02:49:37,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:49:37,912 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-16 02:49:37,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 132 [2021-10-16 02:49:37,979 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 02:49:37,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 109 [2021-10-16 02:49:38,013 INFO L354 Elim1Store]: treesize reduction 59, result has 20.3 percent of original size [2021-10-16 02:49:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 108 [2021-10-16 02:49:38,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:38,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-16 02:49:38,049 INFO L354 Elim1Store]: treesize reduction 94, result has 16.8 percent of original size [2021-10-16 02:49:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 73 [2021-10-16 02:49:38,159 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-16 02:49:38,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 52 [2021-10-16 02:49:38,165 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:49:38,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-10-16 02:49:38,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:49:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:38,227 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:38,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-16 02:49:38,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:38,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-16 02:49:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 740 treesize of output 662 [2021-10-16 02:49:38,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:38,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 592 [2021-10-16 02:49:38,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 842 treesize of output 818 [2021-10-16 02:49:40,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 193 [2021-10-16 02:49:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146792336] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:42,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:49:42,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 21 [2021-10-16 02:49:42,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689981350] [2021-10-16 02:49:42,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-16 02:49:42,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:49:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-16 02:49:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=352, Unknown=2, NotChecked=0, Total=420 [2021-10-16 02:49:42,634 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:49:43,432 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-16 02:49:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:49:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:49:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:49:43,435 INFO L225 Difference]: With dead ends: 33 [2021-10-16 02:49:43,435 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:49:43,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 7598.0ms TimeCoverageRelationStatistics Valid=133, Invalid=567, Unknown=2, NotChecked=0, Total=702 [2021-10-16 02:49:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:49:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-16 02:49:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-16 02:49:43,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-10-16 02:49:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:49:43,441 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-16 02:49:43,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-16 02:49:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:49:43,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:43,442 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:49:43,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:43,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:43,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:49:44,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:49:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash 16144791, now seen corresponding path program 2 times [2021-10-16 02:49:44,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:49:44,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160365761] [2021-10-16 02:49:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:49:44,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:49:44,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:49:44,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:49:44,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:49:44,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:49:44,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:49:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:49:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:44,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:49:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-16 02:49:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:49:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:49:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 02:49:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 02:49:44,622 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-16 02:49:44,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-16 02:49:44,798 INFO L354 Elim1Store]: treesize reduction 78, result has 22.8 percent of original size [2021-10-16 02:49:44,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 40 [2021-10-16 02:49:45,026 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-16 02:49:45,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-10-16 02:49:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:45,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:45,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:45,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:49:47,136 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_19)) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-16 02:49:47,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:47,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 02:49:49,168 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_73 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_20)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_73 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_73) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_19))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-16 02:49:51,216 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_73 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_20)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_73 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_73) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_19))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-16 02:49:51,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:49:51,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-16 02:49:53,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_73 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_77 (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_21)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_77 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_77 (_ bv4 32)) v_DerPreprocessor_20))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_73 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_73) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_19))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-16 02:49:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5434356 treesize of output 5417972 [2021-10-16 03:01:53,327 WARN L207 SmtUtils]: Spent 12.00 m on a formula simplification. DAG size of input: 1005 DAG size of output: 1004 [2021-10-16 03:01:53,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:01:53,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160365761] [2021-10-16 03:01:53,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:01:53,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187659288] [2021-10-16 03:01:53,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:01:53,437 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:01:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:01:53,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:01:53,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 03:01:53,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:01:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:01:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 03:01:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:01:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:01:54,021 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:01:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 03:01:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:01:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:01:54,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:01:54,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 03:01:54,321 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-16 03:01:54,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-10-16 03:01:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-10-16 03:01:54,545 INFO L354 Elim1Store]: treesize reduction 78, result has 22.8 percent of original size [2021-10-16 03:01:54,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 40 [2021-10-16 03:01:54,790 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-16 03:01:54,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-10-16 03:01:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:01:54,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:01:54,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:01:54,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:01:54,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-10-16 03:01:54,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:01:54,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 03:01:56,971 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_98 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse0 v_arrayElimCell_98 (store (store (select .cse0 v_arrayElimCell_98) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_22))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-16 03:01:59,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_arrayElimCell_98 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse0 v_arrayElimCell_98 (store (store (select .cse0 v_arrayElimCell_98) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-16 03:01:59,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:01:59,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-16 03:02:01,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_98 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_84 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_24)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_84 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_84 (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse0 v_arrayElimCell_98 (store (store (select .cse0 v_arrayElimCell_98) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-16 03:02:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20534 treesize of output 20470 [2021-10-16 03:02:02,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:02:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131397123] [2021-10-16 03:02:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:02:02,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:02:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:02:02,418 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:02:02,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 03:02:02,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:02:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:02:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 03:02:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:02,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:02:02,888 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:02:02,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-10-16 03:02:02,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:02:03,060 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 03:02:03,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:02:03,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 03:02:03,238 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-16 03:02:03,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-10-16 03:02:03,413 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-16 03:02:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-10-16 03:02:03,679 INFO L354 Elim1Store]: treesize reduction 170, result has 11.5 percent of original size [2021-10-16 03:02:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 40 [2021-10-16 03:02:03,915 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 03:02:03,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-10-16 03:02:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:02:03,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:03,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:03,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:02:21,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:21,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 03:02:31,663 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_29 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_90 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv1 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_26)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_29 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_29) v_ULTIMATE.start_main_~p~0.offset_90 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_90 (_ bv4 32)) v_DerPreprocessor_25))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_29))))) is different from false [2021-10-16 03:02:31,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:31,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-16 03:02:33,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_29 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_90 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_92 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_27)))) (store .cse1 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse1 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_92 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_92 (_ bv4 32)) v_DerPreprocessor_26))))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_29 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_29) v_ULTIMATE.start_main_~p~0.offset_90 (_ bv1 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_90 (_ bv4 32)) v_DerPreprocessor_25))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_29))))) is different from false [2021-10-16 03:02:33,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10824 treesize of output 10792 [2021-10-16 03:02:34,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:02:34,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:34,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:02:34,754 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:02:34,754 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:02:34,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:02:34,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:02:34,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:02:35,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-16 03:02:35,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:02:35,379 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:02:35,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:02:35 BoogieIcfgContainer [2021-10-16 03:02:35,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:02:35,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:02:35,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:02:35,405 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:02:35,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:48:36" (3/4) ... [2021-10-16 03:02:35,410 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:02:35,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:02:35,411 INFO L168 Benchmark]: Toolchain (without parser) took 839872.39 ms. Allocated memory was 67.1 MB in the beginning and 207.6 MB in the end (delta: 140.5 MB). Free memory was 45.7 MB in the beginning and 126.6 MB in the end (delta: -80.8 MB). Peak memory consumption was 60.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,411 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:02:35,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 544.27 ms. Allocated memory is still 67.1 MB. Free memory was 45.5 MB in the beginning and 42.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 67.1 MB. Free memory was 42.6 MB in the beginning and 40.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,413 INFO L168 Benchmark]: Boogie Preprocessor took 36.79 ms. Allocated memory is still 67.1 MB. Free memory was 40.6 MB in the beginning and 39.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,413 INFO L168 Benchmark]: RCFGBuilder took 477.59 ms. Allocated memory is still 67.1 MB. Free memory was 39.0 MB in the beginning and 46.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,414 INFO L168 Benchmark]: TraceAbstraction took 838760.38 ms. Allocated memory was 67.1 MB in the beginning and 207.6 MB in the end (delta: 140.5 MB). Free memory was 46.4 MB in the beginning and 126.6 MB in the end (delta: -80.1 MB). Peak memory consumption was 135.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:35,414 INFO L168 Benchmark]: Witness Printer took 5.26 ms. Allocated memory is still 207.6 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:02:35,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 544.27 ms. Allocated memory is still 67.1 MB. Free memory was 45.5 MB in the beginning and 42.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 67.1 MB. Free memory was 42.6 MB in the beginning and 40.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.79 ms. Allocated memory is still 67.1 MB. Free memory was 40.6 MB in the beginning and 39.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 477.59 ms. Allocated memory is still 67.1 MB. Free memory was 39.0 MB in the beginning and 46.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 838760.38 ms. Allocated memory was 67.1 MB in the beginning and 207.6 MB in the end (delta: 140.5 MB). Free memory was 46.4 MB in the beginning and 126.6 MB in the end (delta: -80.1 MB). Peak memory consumption was 135.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.26 ms. Allocated memory is still 207.6 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 548]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND TRUE p->h != 1 [L548] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 838677.8ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 11.3ms, AutomataDifference: 16992.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 155 SDslu, 144 SDs, 0 SdLazy, 270 SolverSat, 72 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6076.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 162 SyntacticMatches, 18 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 44875.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 88.7ms SsaConstructionTime, 269.6ms SatisfiabilityAnalysisTime, 27689.4ms InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 188 ConstructedInterpolants, 15 QuantifiedInterpolants, 3000 SizeOfPredicates, 61 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 6/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 03:02:35,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab629c-2e51-4db2-afd1-dde8104f395a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...