./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI --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 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI --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 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:02,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:02,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:02,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:02,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:02,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:02,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:02,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:02,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:02,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:02,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:02,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:02,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:02,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:02,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:02,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:02,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:03,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:03,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:03,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:03,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:03,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:03,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:03,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:03,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:03,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:03,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:03,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:03,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:03,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:03,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:03,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:03,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:03,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:03,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:03,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:03,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:03,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:03,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:03,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:03,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:03,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:03,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:03,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:03,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:03,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:03,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:03,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:03,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:03,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:03,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:03,091 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:03,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:03,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:03,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:03,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:03,099 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:03,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:03,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:03,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:03,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:03,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:03,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:03,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:03,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:03,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:03,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:03,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:03,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:03,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:03,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:03,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:03,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:03,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:03,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:03,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:03,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:03,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:03,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:03,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:03,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:03,107 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 [2021-10-11 02:26:03,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:03,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:03,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:03,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:03,412 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:03,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/sqm-if.c [2021-10-11 02:26:03,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/9b860e830/db57916e0e914961b30de864cd7c54b4/FLAG46fe84b27 [2021-10-11 02:26:04,029 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:04,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c [2021-10-11 02:26:04,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/9b860e830/db57916e0e914961b30de864cd7c54b4/FLAG46fe84b27 [2021-10-11 02:26:04,374 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/9b860e830/db57916e0e914961b30de864cd7c54b4 [2021-10-11 02:26:04,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:04,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:04,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:04,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:04,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:04,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52003751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04, skipping insertion in model container [2021-10-11 02:26:04,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:04,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:04,610 WARN L226 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2021-10-11 02:26:04,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:04,657 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:04,674 WARN L226 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2021-10-11 02:26:04,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:04,720 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:04,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04 WrapperNode [2021-10-11 02:26:04,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:04,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:04,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:04,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:04,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:04,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:04,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:04,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:04,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... [2021-10-11 02:26:04,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:04,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:04,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:04,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:04,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:04,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:05,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:05,680 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:26:05,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:05 BoogieIcfgContainer [2021-10-11 02:26:05,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:05,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:05,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:05,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:05,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:04" (1/3) ... [2021-10-11 02:26:05,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acb9a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:05, skipping insertion in model container [2021-10-11 02:26:05,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:04" (2/3) ... [2021-10-11 02:26:05,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acb9a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:05, skipping insertion in model container [2021-10-11 02:26:05,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:05" (3/3) ... [2021-10-11 02:26:05,692 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2021-10-11 02:26:05,706 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:05,710 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:05,724 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:05,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:05,761 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:05,761 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:05,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:05,761 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:05,762 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:05,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:05,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:26:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:05,787 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:05,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:05,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2021-10-11 02:26:05,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:05,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102725012] [2021-10-11 02:26:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:05,920 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:26:05,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002415287] [2021-10-11 02:26:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:06,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102725012] [2021-10-11 02:26:06,215 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:06,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002415287] [2021-10-11 02:26:06,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:06,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-11 02:26:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311494143] [2021-10-11 02:26:06,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:06,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:06,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:06,246 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-10-11 02:26:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:06,336 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:26:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:06,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:06,346 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:26:06,346 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:26:06,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:26:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:26:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:26:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:26:06,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:26:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:06,399 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:26:06,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:26:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:06,400 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:06,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:06,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:26:06,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2021-10-11 02:26:06,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:06,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270709386] [2021-10-11 02:26:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:06,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:26:06,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748385990] [2021-10-11 02:26:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:06,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:06,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270709386] [2021-10-11 02:26:06,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748385990] [2021-10-11 02:26:06,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:06,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:26:06,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924136212] [2021-10-11 02:26:06,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:06,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:06,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:06,848 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2021-10-11 02:26:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:06,918 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:26:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:06,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:26:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:06,920 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:26:06,920 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:26:06,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:26:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:26:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:26:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:26:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:26:06,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:26:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:06,938 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:26:06,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:26:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:26:06,939 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:06,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:07,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:07,163 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2021-10-11 02:26:07,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:07,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068721599] [2021-10-11 02:26:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:07,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:26:07,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919044066] [2021-10-11 02:26:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:26:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:07,426 INFO L382 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 [2021-10-11 02:26:07,427 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:07,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:07,431 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:26:07,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-10-11 02:26:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:07,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:07,511 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:26:07,512 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,645 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,658 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,659 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,667 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,733 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:07,734 INFO L382 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 46 treesize of output 49 [2021-10-11 02:26:07,740 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:26:07,750 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_1], 2=[v_arrayElimCell_2]} [2021-10-11 02:26:07,798 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse3 (< 2147483647 .cse14)) (.cse8 (< 2147483647 .cse13)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse5 (<= .cse14 2147483647)) (.cse4 (<= .cse13 2147483647))) (and (or .cse0 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse1 (select v_prenex_13 v_prenex_12))) (store .cse1 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_14) (let ((.cse2 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_13 v_prenex_11) (+ v_prenex_15 .cse2 (- 34359738368))) (select .cse1 (+ v_prenex_14 .cse2 (- 34359738368))) 2)))) v_prenex_14) 1)) .cse3 .cse4) (or .cse0 .cse5 (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse6 (select v_prenex_3 v_prenex_2))) (store .cse6 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_4 (- 34359738368)) (let ((.cse7 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse6 (+ v_prenex_4 .cse7)) (select (select v_prenex_3 v_prenex_1) (+ v_prenex_5 .cse7)) 2)))) v_prenex_4) 1)) .cse8) (or .cse0 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse9 (select v_prenex_8 v_prenex_7))) (store .cse9 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_9) (let ((.cse10 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse9 (+ .cse10 v_prenex_9)) (select (select v_prenex_8 v_prenex_6) (+ .cse10 v_prenex_10)) 2)))) v_prenex_9) 1)) .cse3 .cse8) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse11 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~a~0.offset (- 34359738368)) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select |#memory_int| ULTIMATE.start_main_~b~0.base) (+ .cse12 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select .cse11 (+ ULTIMATE.start_main_~a~0.offset .cse12 (- 34359738368))) 2)))) ULTIMATE.start_main_~a~0.offset) 1)) .cse5 .cse4)))) is different from false [2021-10-11 02:26:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-11 02:26:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068721599] [2021-10-11 02:26:07,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919044066] [2021-10-11 02:26:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859097843] [2021-10-11 02:26:07,848 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:26:07,848 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:07,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:07,864 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:07,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:08,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:08,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:08,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:08,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:08,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:09,628 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:11,841 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-10-11 02:26:12,023 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:26:12,213 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:26:12,487 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-10-11 02:26:12,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:12,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:26:12,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-11 02:26:12,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660205601] [2021-10-11 02:26:12,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:26:12,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:26:12,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2021-10-11 02:26:12,491 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2021-10-11 02:26:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:12,985 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:26:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:26:12,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-10-11 02:26:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:12,988 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:26:12,989 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:26:12,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2021-10-11 02:26:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:26:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2021-10-11 02:26:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:26:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-11 02:26:12,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-11 02:26:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:12,999 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-11 02:26:12,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:26:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-11 02:26:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:13,000 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:13,000 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:13,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:13,214 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:13,214 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2021-10-11 02:26:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:13,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119607813] [2021-10-11 02:26:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:13,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:26:13,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49340577] [2021-10-11 02:26:13,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:13,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:26:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:26:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:13,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:13,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119607813] [2021-10-11 02:26:13,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49340577] [2021-10-11 02:26:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166573946] [2021-10-11 02:26:13,482 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:26:13,483 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:13,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:13,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:13,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:13,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:13,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:13,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:26:14,956 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:15,161 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-10-11 02:26:15,340 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:26:15,584 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:26:15,893 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-10-11 02:26:15,895 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:15,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:26:15,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:26:15,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115177934] [2021-10-11 02:26:15,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:26:15,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:15,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:26:15,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:15,897 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2021-10-11 02:26:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:16,042 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:26:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:16,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:26:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:16,044 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:26:16,044 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:26:16,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:26:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:26:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-10-11 02:26:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:26:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:26:16,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-10-11 02:26:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:16,048 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:26:16,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:26:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:26:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:26:16,049 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:16,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:16,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:16,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:16,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2021-10-11 02:26:16,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:16,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600178424] [2021-10-11 02:26:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:16,273 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:26:16,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919507052] [2021-10-11 02:26:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:16,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:26:16,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:16,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 02:26:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:16,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:16,897 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-10-11 02:26:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600178424] [2021-10-11 02:26:16,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919507052] [2021-10-11 02:26:16,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:26:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747068022] [2021-10-11 02:26:16,938 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:26:16,939 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:16,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:16,939 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:16,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:16,957 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@442ada16 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2021-10-11 02:26:16,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:16,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:26:16,960 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-10-11 02:26:16,960 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:17,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:17,175 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,175 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,176 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,176 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,176 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,176 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,176 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,176 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,176 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,176 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,176 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,177 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,177 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:26:17,177 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:26:17,185 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:26:17,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:17 BoogieIcfgContainer [2021-10-11 02:26:17,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:17,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:17,186 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:17,187 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:17,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:05" (3/4) ... [2021-10-11 02:26:17,191 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:26:17,191 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:17,192 INFO L168 Benchmark]: Toolchain (without parser) took 12809.61 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 54.4 MB in the beginning and 73.6 MB in the end (delta: -19.2 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:17,192 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:17,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.80 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 70.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:17,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:17,194 INFO L168 Benchmark]: Boogie Preprocessor took 51.60 ms. Allocated memory is still 96.5 MB. Free memory was 68.8 MB in the beginning and 67.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:17,194 INFO L168 Benchmark]: RCFGBuilder took 857.04 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 67.6 MB in the beginning and 88.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:17,195 INFO L168 Benchmark]: TraceAbstraction took 11500.90 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 87.4 MB in the beginning and 73.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 68.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:17,195 INFO L168 Benchmark]: Witness Printer took 4.79 ms. Allocated memory is still 172.0 MB. Free memory is still 73.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:17,197 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.80 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 70.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.60 ms. Allocated memory is still 96.5 MB. Free memory was 68.8 MB in the beginning and 67.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 857.04 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 67.6 MB in the beginning and 88.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11500.90 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 87.4 MB in the beginning and 73.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 68.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.79 ms. Allocated memory is still 172.0 MB. Free memory is still 73.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI 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 -> 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 [2021-10-11 02:26:20,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:20,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:20,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:20,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:20,448 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:20,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/sqm-if.c [2021-10-11 02:26:20,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/bb46bad1a/8960579810a349fd82c0ee71309c44b5/FLAG8c60043b8 [2021-10-11 02:26:20,998 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:20,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c [2021-10-11 02:26:21,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/bb46bad1a/8960579810a349fd82c0ee71309c44b5/FLAG8c60043b8 [2021-10-11 02:26:21,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/data/bb46bad1a/8960579810a349fd82c0ee71309c44b5 [2021-10-11 02:26:21,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:21,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:21,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:21,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:21,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:21,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5510d69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21, skipping insertion in model container [2021-10-11 02:26:21,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:21,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:21,562 WARN L226 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2021-10-11 02:26:21,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:21,594 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:21,614 WARN L226 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_22bb72aa-302d-4548-8d04-df7437ef2ebf/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2021-10-11 02:26:21,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:21,668 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:21,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21 WrapperNode [2021-10-11 02:26:21,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:21,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:21,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:21,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:21,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:21,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:21,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:21,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:21,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:21,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:21,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:21,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:21,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:26:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-11 02:26:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-11 02:26:22,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:22,545 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:26:22,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22 BoogieIcfgContainer [2021-10-11 02:26:22,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:22,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:22,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:22,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:22,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:21" (1/3) ... [2021-10-11 02:26:22,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303cf859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2021-10-11 02:26:22,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (2/3) ... [2021-10-11 02:26:22,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303cf859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2021-10-11 02:26:22,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22" (3/3) ... [2021-10-11 02:26:22,559 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2021-10-11 02:26:22,572 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:22,575 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:22,586 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:22,622 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:22,623 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:22,623 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:22,623 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:22,623 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:22,623 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:22,624 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:22,624 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:26:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:22,648 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:22,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:22,649 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:22,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-11 02:26:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661973147] [2021-10-11 02:26:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:26:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:22,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:26:22,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661973147] [2021-10-11 02:26:22,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:22,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:22,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839022910] [2021-10-11 02:26:22,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:26:22,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:22,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:26:22,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:26:22,957 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:26:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:22,976 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-11 02:26:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:26:22,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-10-11 02:26:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:22,992 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:26:22,992 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:26:22,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:26:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:26:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:26:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:26:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:26:23,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-11 02:26:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:23,027 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:26:23,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:26:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:26:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:23,028 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:23,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:23,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:26:23,247 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-11 02:26:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:23,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887473534] [2021-10-11 02:26:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:23,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:26:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:23,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:26:23,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887473534] [2021-10-11 02:26:23,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:23,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:26:23,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880110729] [2021-10-11 02:26:23,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:23,626 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-10-11 02:26:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:24,100 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-11 02:26:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:24,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:26:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:24,110 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:26:24,110 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:26:24,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:26:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:26:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:26:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:26:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:26:24,118 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-11 02:26:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:24,118 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:26:24,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:26:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:26:24,119 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:24,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:24,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:26:24,339 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-11 02:26:24,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:24,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620153624] [2021-10-11 02:26:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:26:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:24,670 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:26:24,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:24,687 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:24,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:26:24,689 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2021-10-11 02:26:24,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:26:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:24,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:26:24,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620153624] [2021-10-11 02:26:24,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:24,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:26:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964043106] [2021-10-11 02:26:24,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:26:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:26:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:26:24,808 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-10-11 02:26:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:25,266 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:26:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:26:25,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:26:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:25,268 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:26:25,268 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:26:25,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:26:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:26:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-10-11 02:26:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:26:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 02:26:25,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-11 02:26:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:25,276 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 02:26:25,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:26:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 02:26:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:26:25,277 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:25,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:25,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:26:25,486 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-11 02:26:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:25,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053677119] [2021-10-11 02:26:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:26:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:25,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:26,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053677119] [2021-10-11 02:26:26,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038090232] [2021-10-11 02:26:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:26:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:26,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:26,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:26,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2021-10-11 02:26:26,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406608980] [2021-10-11 02:26:26,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:26:26,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:26:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:26:26,715 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2021-10-11 02:26:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:27,714 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-10-11 02:26:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:26:27,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 02:26:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:27,720 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:26:27,720 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:26:27,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:26:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:26:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-10-11 02:26:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:26:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:26:27,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-10-11 02:26:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:27,727 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:26:27,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:26:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:26:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:26:27,728 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:27,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:28,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:28,129 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-11 02:26:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:28,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881938456] [2021-10-11 02:26:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:28,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:26:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:26:28,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:28,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:28,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:26:28,502 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2021-10-11 02:26:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:26:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:26:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:26:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:26:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:26:28,713 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:26:28,713 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 169 [2021-10-11 02:26:28,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:28,848 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:26:28,854 INFO L625 ElimStorePlain]: treesize reduction 97, result has 59.9 percent of original size [2021-10-11 02:26:28,861 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:26:28,861 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:191, output treesize:145 [2021-10-11 02:26:29,067 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:26:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:26:29,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:30,308 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-10-11 02:26:38,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881938456] [2021-10-11 02:26:38,055 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:26:38,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [390700249] [2021-10-11 02:26:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:26:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:38,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6c395be9 [2021-10-11 02:26:38,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742818812] [2021-10-11 02:26:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22bb72aa-302d-4548-8d04-df7437ef2ebf/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:26:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:38,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6c395be9 [2021-10-11 02:26:38,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:38,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:26:38,520 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:26:38,520 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:39,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:39,138 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:26:39,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:39 BoogieIcfgContainer [2021-10-11 02:26:39,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:39,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:39,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:39,140 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:39,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22" (3/4) ... [2021-10-11 02:26:39,143 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:26:39,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:39,145 INFO L168 Benchmark]: Toolchain (without parser) took 17754.46 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 32.8 MB in the beginning and 34.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:39,145 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 54.5 MB. Free memory is still 35.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:39,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.83 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.6 MB in the beginning and 49.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:39,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 47.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:39,147 INFO L168 Benchmark]: Boogie Preprocessor took 29.25 ms. Allocated memory is still 67.1 MB. Free memory was 47.9 MB in the beginning and 46.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:39,148 INFO L168 Benchmark]: RCFGBuilder took 809.96 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 47.5 MB in the end (delta: -965.0 kB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:39,149 INFO L168 Benchmark]: TraceAbstraction took 16590.23 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 47.0 MB in the beginning and 35.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:39,149 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 81.8 MB. Free memory is still 34.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:39,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 54.5 MB. Free memory is still 35.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.83 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.6 MB in the beginning and 49.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.87 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 47.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.25 ms. Allocated memory is still 67.1 MB. Free memory was 47.9 MB in the beginning and 46.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 809.96 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 47.5 MB in the end (delta: -965.0 kB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16590.23 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 47.0 MB in the beginning and 35.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.20 ms. Allocated memory is still 81.8 MB. Free memory is still 34.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i