./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.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_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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_2f38685b-3241-4f42-aab3-120766e7eb6b/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 ab443682b8ebd5ebec1293e1098a08dcb4fa4fdb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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_2f38685b-3241-4f42-aab3-120766e7eb6b/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 ab443682b8ebd5ebec1293e1098a08dcb4fa4fdb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:24:22,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:24:22,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:24:22,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:24:22,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:24:22,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:24:22,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:24:22,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:24:22,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:24:22,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:24:22,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:24:22,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:24:22,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:24:22,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:24:22,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:24:22,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:24:22,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:24:22,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:24:22,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:24:22,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:24:22,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:24:22,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:24:22,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:24:22,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:24:22,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:24:22,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:24:22,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:24:22,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:24:22,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:24:22,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:24:22,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:24:22,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:24:22,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:24:22,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:24:22,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:24:22,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:24:22,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:24:22,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:24:22,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:24:22,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:24:22,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:24:22,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:24:22,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:24:22,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:24:22,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:24:22,367 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:24:22,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:24:22,367 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:24:22,367 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:24:22,367 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:24:22,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:24:22,368 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:24:22,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:24:22,368 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:24:22,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:24:22,369 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:24:22,369 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:24:22,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:24:22,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:24:22,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:24:22,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:24:22,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:24:22,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:24:22,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:24:22,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:24:22,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:24:22,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:24:22,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:24:22,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:24:22,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:24:22,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:24:22,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:24:22,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:22,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:24:22,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:24:22,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:24:22,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:24:22,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:24:22,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:24:22,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:24:22,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:24:22,375 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_2f38685b-3241-4f42-aab3-120766e7eb6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab443682b8ebd5ebec1293e1098a08dcb4fa4fdb [2021-10-11 02:24:22,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:22,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:22,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:22,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:22,682 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:22,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-10-11 02:24:22,777 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/960421473/e8ef1a09ac424cc4a1050b31d97c4747/FLAG1c2d3a550 [2021-10-11 02:24:23,189 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:23,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-10-11 02:24:23,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/960421473/e8ef1a09ac424cc4a1050b31d97c4747/FLAG1c2d3a550 [2021-10-11 02:24:23,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/960421473/e8ef1a09ac424cc4a1050b31d97c4747 [2021-10-11 02:24:23,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:23,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:23,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:23,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:23,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:23,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f8e189f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23, skipping insertion in model container [2021-10-11 02:24:23,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:23,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:23,804 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_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-10-11 02:24:23,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:23,832 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:23,843 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_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-10-11 02:24:23,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:23,867 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:23,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23 WrapperNode [2021-10-11 02:24:23,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:23,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:23,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:23,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:23,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:23,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:23,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:23,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:23,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... [2021-10-11 02:24:23,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:23,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:23,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:23,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:23,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:24,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:24:24,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:24,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:24:24,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:24:24,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:24,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:24,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:24:24,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:24,608 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:24:24,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:24 BoogieIcfgContainer [2021-10-11 02:24:24,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:24,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:24,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:24,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:24,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:23" (1/3) ... [2021-10-11 02:24:24,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2b5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:24, skipping insertion in model container [2021-10-11 02:24:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:23" (2/3) ... [2021-10-11 02:24:24,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2b5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:24, skipping insertion in model container [2021-10-11 02:24:24,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:24" (3/3) ... [2021-10-11 02:24:24,618 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-10-11 02:24:24,632 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:24,636 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:24,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:24,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:24,670 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:24,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:24,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:24,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:24,670 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:24,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:24,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:24:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:24:24,688 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:24,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:24,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2021-10-11 02:24:24,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482310323] [2021-10-11 02:24:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:24,826 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:24,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513134187] [2021-10-11 02:24:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:25,115 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 02:24:25,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:25,157 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 02:24:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482310323] [2021-10-11 02:24:25,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:25,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513134187] [2021-10-11 02:24:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:25,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-11 02:24:25,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490101250] [2021-10-11 02:24:25,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:25,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:25,190 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-10-11 02:24:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:25,256 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:24:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:25,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:24:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:25,267 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:24:25,267 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:24:25,271 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 02:24:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:24:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:24:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:24:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:24:25,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:24:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:25,302 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:24:25,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:24:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:24:25,303 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:25,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:25,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:24:25,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2021-10-11 02:24:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:25,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061860400] [2021-10-11 02:24:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:25,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:25,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49236630] [2021-10-11 02:24:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:25,754 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 02:24:25,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:25,797 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 02:24:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061860400] [2021-10-11 02:24:25,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49236630] [2021-10-11 02:24:25,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:25,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:24:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532632379] [2021-10-11 02:24:25,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:24:25,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:25,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:24:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:25,806 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2021-10-11 02:24:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:25,878 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:24:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:24:25,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:24:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:25,880 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:24:25,880 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:24:25,881 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 02:24:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:24:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:24:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:24:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:24:25,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:24:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:25,886 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:24:25,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:24:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:24:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:24:25,886 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:25,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:26,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:26,113 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2021-10-11 02:24:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:26,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279291303] [2021-10-11 02:24:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:26,147 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:26,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069375292] [2021-10-11 02:24:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 02:24:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:26,353 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 02:24:26,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:26,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:26,359 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:26,359 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-10-11 02:24:26,417 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 02:24:26,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:26,453 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:24:26,453 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,563 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,565 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,567 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,578 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,630 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:26,631 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 44 treesize of output 47 [2021-10-11 02:24:26,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:26,642 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2021-10-11 02:24:26,669 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 ((.cse1 (<= .cse14 2147483647)) (.cse7 (<= .cse13 2147483647)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse2 (< 2147483647 .cse13))) (and (or .cse0 .cse1 .cse2 (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 ((.cse3 (select v_prenex_8 v_prenex_6))) (store .cse3 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_10 (- 34359738368)) (let ((.cse4 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_8 v_prenex_7) (+ .cse4 v_prenex_9)) (select .cse3 (+ .cse4 v_prenex_10)))))) v_prenex_10) 1))) (or .cse0 .cse1 (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 ((.cse5 (select v_prenex_13 v_prenex_11))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_15 (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse5 (+ v_prenex_15 .cse6 (- 34359738368))) (select (select v_prenex_13 v_prenex_12) (+ v_prenex_14 .cse6 (- 34359738368))))))) v_prenex_15) 1)) .cse7) (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 ((.cse8 (select |#memory_int| ULTIMATE.start_main_~b~0.base))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~b~0.offset) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse9 (- 34359738368))))))) ULTIMATE.start_main_~b~0.offset) 1)) .cse10 .cse7) (or (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 ((.cse11 (select v_prenex_3 v_prenex_1))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_5) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_3 v_prenex_2) (+ v_prenex_4 .cse12)) (select .cse11 (+ v_prenex_5 .cse12)))))) v_prenex_5) 1)) .cse0 .cse10 .cse2)))) is different from false [2021-10-11 02:24:26,695 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 02:24:26,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279291303] [2021-10-11 02:24:26,696 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:26,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069375292] [2021-10-11 02:24:26,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993279215] [2021-10-11 02:24:26,719 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:24:26,719 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:26,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:26,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:26,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:26,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:27,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:27,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:27,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:27,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:28,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:24:29,176 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:24:29,422 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:24:29,708 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:24:32,220 WARN L197 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:24:32,223 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:32,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:24:32,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-11 02:24:32,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956968957] [2021-10-11 02:24:32,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:24:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:24:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=163, Unknown=1, NotChecked=26, Total=240 [2021-10-11 02:24:32,228 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2021-10-11 02:24:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:34,723 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:24:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:24:34,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-10-11 02:24:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:34,726 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:24:34,727 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:24:34,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=123, Invalid=431, Unknown=2, NotChecked=44, Total=600 [2021-10-11 02:24:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:24:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2021-10-11 02:24:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:24:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-11 02:24:34,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-11 02:24:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:34,736 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-11 02:24:34,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:24:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-11 02:24:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:24:34,737 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:34,737 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:34,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:34,961 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2021-10-11 02:24:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:34,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762866543] [2021-10-11 02:24:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:35,003 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419342575] [2021-10-11 02:24:35,003 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_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:35,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:24:35,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:24:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:35,157 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 02:24:35,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:35,205 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 02:24:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762866543] [2021-10-11 02:24:35,206 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419342575] [2021-10-11 02:24:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915876293] [2021-10-11 02:24:35,211 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:24:35,212 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:35,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:35,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:35,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:35,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:35,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:35,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:35,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:35,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:36,865 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:24:37,088 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:24:37,291 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:24:37,534 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:24:37,911 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:24:37,912 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:37,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:24:37,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:24:37,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369875197] [2021-10-11 02:24:37,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:24:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:24:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:24:37,915 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2021-10-11 02:24:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:38,079 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:24:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:24:38,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:24:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:38,081 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:24:38,082 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:24:38,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:24:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:24:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-10-11 02:24:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:24:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:24:38,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-10-11 02:24:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:38,090 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:24:38,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:24:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:24:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:24:38,091 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:38,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:38,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:38,317 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2021-10-11 02:24:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:38,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478367083] [2021-10-11 02:24:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:38,351 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68905301] [2021-10-11 02:24:38,351 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_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:38,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:24:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 02:24:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:38,777 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 02:24:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:39,041 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-10-11 02:24:39,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478367083] [2021-10-11 02:24:39,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:39,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68905301] [2021-10-11 02:24:39,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:24:39,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065450194] [2021-10-11 02:24:39,089 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:24:39,090 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:39,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:39,090 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:39,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:39,107 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f3ea813 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 02:24:39,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:24:39,114 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-10-11 02:24:39,114 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:39,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:39,336 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 02:24:39,336 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,336 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 02:24:39,336 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,337 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 02:24:39,337 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,337 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 02:24:39,337 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,337 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 02:24:39,337 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,338 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 02:24:39,338 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,338 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 02:24:39,338 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:24:39,347 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:24:39,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:39 BoogieIcfgContainer [2021-10-11 02:24:39,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:39,348 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:39,348 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:39,349 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:39,349 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:24" (3/4) ... [2021-10-11 02:24:39,351 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:24:39,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:39,352 INFO L168 Benchmark]: Toolchain (without parser) took 15753.36 ms. Allocated memory was 115.3 MB in the beginning and 220.2 MB in the end (delta: 104.9 MB). Free memory was 77.3 MB in the beginning and 99.0 MB in the end (delta: -21.7 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:39,352 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 115.3 MB. Free memory is still 94.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:39,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.39 ms. Allocated memory is still 115.3 MB. Free memory was 77.1 MB in the beginning and 89.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:39,353 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.09 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 88.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:39,357 INFO L168 Benchmark]: Boogie Preprocessor took 26.03 ms. Allocated memory is still 115.3 MB. Free memory was 88.3 MB in the beginning and 86.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:39,358 INFO L168 Benchmark]: RCFGBuilder took 676.56 ms. Allocated memory is still 115.3 MB. Free memory was 86.8 MB in the beginning and 59.7 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:39,359 INFO L168 Benchmark]: TraceAbstraction took 14736.95 ms. Allocated memory was 115.3 MB in the beginning and 220.2 MB in the end (delta: 104.9 MB). Free memory was 59.3 MB in the beginning and 99.0 MB in the end (delta: -39.7 MB). Peak memory consumption was 65.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:39,359 INFO L168 Benchmark]: Witness Printer took 2.56 ms. Allocated memory is still 220.2 MB. Free memory is still 99.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:39,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 115.3 MB. Free memory is still 94.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.39 ms. Allocated memory is still 115.3 MB. Free memory was 77.1 MB in the beginning and 89.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.09 ms. Allocated memory is still 115.3 MB. Free memory was 89.7 MB in the beginning and 88.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.03 ms. Allocated memory is still 115.3 MB. Free memory was 88.3 MB in the beginning and 86.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 676.56 ms. Allocated memory is still 115.3 MB. Free memory was 86.8 MB in the beginning and 59.7 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14736.95 ms. Allocated memory was 115.3 MB in the beginning and 220.2 MB in the end (delta: 104.9 MB). Free memory was 59.3 MB in the beginning and 99.0 MB in the end (delta: -39.7 MB). Peak memory consumption was 65.8 MB. Max. memory is 16.1 GB. * Witness Printer took 2.56 ms. Allocated memory is still 220.2 MB. Free memory is still 99.0 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_2f38685b-3241-4f42-aab3-120766e7eb6b/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 -> ab443682b8ebd5ebec1293e1098a08dcb4fa4fdb [2021-10-11 02:24:42,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:42,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:42,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:42,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:42,487 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:42,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-10-11 02:24:42,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/e9a20adde/5e1d80da37c844ab96095feaa55a19ad/FLAG708199e8f [2021-10-11 02:24:43,145 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:43,147 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-10-11 02:24:43,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/e9a20adde/5e1d80da37c844ab96095feaa55a19ad/FLAG708199e8f [2021-10-11 02:24:43,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/bin/utaipan-WLngWcDbfI/data/e9a20adde/5e1d80da37c844ab96095feaa55a19ad [2021-10-11 02:24:43,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:43,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:43,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:43,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:43,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:43,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b493ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43, skipping insertion in model container [2021-10-11 02:24:43,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:43,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:43,691 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_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-10-11 02:24:43,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:43,726 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:43,739 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_2f38685b-3241-4f42-aab3-120766e7eb6b/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-10-11 02:24:43,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:43,802 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:43,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43 WrapperNode [2021-10-11 02:24:43,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:43,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:43,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:43,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:43,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:43,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:43,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:43,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:43,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... [2021-10-11 02:24:43,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:43,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:43,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:43,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:43,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:24:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-11 02:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:43,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-11 02:24:44,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:44,457 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:24:44,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:44 BoogieIcfgContainer [2021-10-11 02:24:44,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:44,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:44,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:44,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:44,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:43" (1/3) ... [2021-10-11 02:24:44,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480f50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:44, skipping insertion in model container [2021-10-11 02:24:44,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:43" (2/3) ... [2021-10-11 02:24:44,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480f50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:44, skipping insertion in model container [2021-10-11 02:24:44,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:44" (3/3) ... [2021-10-11 02:24:44,467 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-10-11 02:24:44,497 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:44,500 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:44,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:44,561 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:44,561 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:44,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:44,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:44,562 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:44,562 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:44,562 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:44,563 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:24:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:24:44,588 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:44,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:44,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-11 02:24:44,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:44,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337220444] [2021-10-11 02:24:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:44,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:24:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:44,880 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 02:24:44,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337220444] [2021-10-11 02:24:44,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:44,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:24:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023806658] [2021-10-11 02:24:44,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:24:44,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:24:44,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:24:44,921 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:24:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:44,942 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-11 02:24:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:24:44,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-10-11 02:24:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:44,954 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:24:44,954 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:24:44,957 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 02:24:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:24:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:24:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:24:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:24:44,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-11 02:24:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:44,993 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:24:44,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:24:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:24:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:24:44,994 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:44,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:45,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:24:45,198 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-11 02:24:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:45,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753644712] [2021-10-11 02:24:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:24:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:45,572 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 02:24:45,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753644712] [2021-10-11 02:24:45,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:45,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:24:45,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434874273] [2021-10-11 02:24:45,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:24:45,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:24:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:45,578 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-10-11 02:24:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:45,979 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-11 02:24:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:24:45,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:24:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:45,987 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:24:45,987 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:24:45,988 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 02:24:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:24:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:24:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:24:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:24:45,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-11 02:24:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:45,995 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:24:45,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:24:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:24:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:24:45,996 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:45,996 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 02:24:46,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:24:46,208 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-11 02:24:46,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:46,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801025804] [2021-10-11 02:24:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:24:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:46,526 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 02:24:46,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:46,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:46,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:46,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2021-10-11 02:24:46,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:24:46,710 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 02:24:46,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:46,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801025804] [2021-10-11 02:24:46,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:46,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:24:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495998525] [2021-10-11 02:24:46,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:24:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:46,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:24:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:24:46,720 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-10-11 02:24:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:47,060 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:24:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:24:47,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:24:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:47,065 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:24:47,065 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:24:47,066 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 02:24:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:24:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-10-11 02:24:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:24:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 02:24:47,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-11 02:24:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:47,073 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 02:24:47,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:24:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 02:24:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:24:47,074 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:47,074 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 02:24:47,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:24:47,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-11 02:24:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:47,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227361733] [2021-10-11 02:24:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:24:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:47,699 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 02:24:47,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:47,961 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 02:24:47,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227361733] [2021-10-11 02:24:47,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [435362411] [2021-10-11 02:24:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:24:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:48,319 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 02:24:48,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:48,405 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 02:24:48,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:24:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2021-10-11 02:24:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714558998] [2021-10-11 02:24:48,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:24:48,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:24:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:24:48,408 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2021-10-11 02:24:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:49,291 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-10-11 02:24:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:24:49,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 02:24:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:49,297 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:24:49,297 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:24:49,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:24:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:24:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-10-11 02:24:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:24:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:24:49,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-10-11 02:24:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:49,311 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:24:49,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:24:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:24:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:24:49,312 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:49,312 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 02:24:49,715 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 02:24:49,716 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-11 02:24:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:49,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682784310] [2021-10-11 02:24:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:24:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,023 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 02:24:50,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:50,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:50,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:50,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2021-10-11 02:24:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:50,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:50,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:50,246 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:24:50,246 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 184 treesize of output 165 [2021-10-11 02:24:50,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:50,351 INFO L625 ElimStorePlain]: treesize reduction 107, result has 60.1 percent of original size [2021-10-11 02:24:50,360 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 02:24:50,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:187, output treesize:161 [2021-10-11 02:24:50,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:24:50,671 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 02:24:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:51,604 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-10-11 02:24:58,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682784310] [2021-10-11 02:24:58,451 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:24:58,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [563789387] [2021-10-11 02:24:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:58,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:24:58,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:58,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f339810 [2021-10-11 02:24:58,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839597497] [2021-10-11 02:24:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f38685b-3241-4f42-aab3-120766e7eb6b/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 02:24:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:24:58,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:58,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7f339810 [2021-10-11 02:24:58,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:58,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:24:58,935 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:24:58,935 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:59,540 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 02:24:59,555 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:24:59,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:59 BoogieIcfgContainer [2021-10-11 02:24:59,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:59,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:59,557 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:59,557 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:59,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:44" (3/4) ... [2021-10-11 02:24:59,560 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:24:59,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:59,571 INFO L168 Benchmark]: Toolchain (without parser) took 16068.92 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 78.7 MB in the end (delta: -28.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,571 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 66.3 MB in the beginning and 66.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.82 ms. Allocated memory is still 83.9 MB. Free memory was 49.5 MB in the beginning and 68.9 MB in the end (delta: -19.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:59,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 83.9 MB. Free memory was 68.9 MB in the beginning and 67.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,575 INFO L168 Benchmark]: Boogie Preprocessor took 32.68 ms. Allocated memory is still 83.9 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,576 INFO L168 Benchmark]: RCFGBuilder took 570.89 ms. Allocated memory is still 83.9 MB. Free memory was 65.8 MB in the beginning and 49.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:59,582 INFO L168 Benchmark]: TraceAbstraction took 15095.58 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 78.7 MB in the end (delta: -30.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,582 INFO L168 Benchmark]: Witness Printer took 4.27 ms. Allocated memory is still 102.8 MB. Free memory is still 78.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:59,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 66.3 MB in the beginning and 66.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.82 ms. Allocated memory is still 83.9 MB. Free memory was 49.5 MB in the beginning and 68.9 MB in the end (delta: -19.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 83.9 MB. Free memory was 68.9 MB in the beginning and 67.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.68 ms. Allocated memory is still 83.9 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 570.89 ms. Allocated memory is still 83.9 MB. Free memory was 65.8 MB in the beginning and 49.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15095.58 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 78.7 MB in the end (delta: -30.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.27 ms. Allocated memory is still 102.8 MB. Free memory is still 78.7 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