./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur --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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:43:00,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:43:00,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:43:00,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:43:00,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:43:00,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:43:00,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:43:00,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:43:00,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:43:00,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:43:00,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:43:00,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:43:00,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:43:00,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:43:00,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:43:00,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:43:00,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:43:00,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:43:00,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:43:00,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:43:00,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:43:00,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:43:00,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:43:00,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:43:00,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:43:00,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:43:00,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:43:00,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:43:00,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:43:00,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:43:00,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:43:00,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:43:00,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:43:00,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:43:00,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:43:00,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:43:00,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:43:00,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:43:00,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:43:00,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:43:00,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:43:00,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:43:00,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:43:00,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:43:00,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:43:00,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:43:00,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:43:00,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:43:00,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:43:00,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:43:00,360 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:43:00,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:43:00,360 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:43:00,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:43:00,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:43:00,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:43:00,361 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:43:00,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:43:00,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:43:00,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:43:00,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:43:00,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:43:00,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:43:00,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:43:00,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:43:00,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:43:00,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:43:00,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:43:00,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:43:00,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:43:00,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:43:00,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:43:00,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:43:00,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:43:00,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:43:00,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:43:00,367 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:43:00,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:43:00,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:43:00,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:43:00,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:43:00,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:43:00,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:43:00,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2022-11-26 00:43:00,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:43:00,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:43:00,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:43:00,702 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:43:00,702 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:43:00,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2022-11-26 00:43:04,322 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:43:04,543 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:43:04,544 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2022-11-26 00:43:04,552 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/data/4f8d19d50/2cb45befa9264445bc93d43054c344e5/FLAG13b23d524 [2022-11-26 00:43:04,570 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/data/4f8d19d50/2cb45befa9264445bc93d43054c344e5 [2022-11-26 00:43:04,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:43:04,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:43:04,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:43:04,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:43:04,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:43:04,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d84281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04, skipping insertion in model container [2022-11-26 00:43:04,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:43:04,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:43:04,803 WARN L237 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_98dc89f4-7eef-4ce9-bab3-de6814079e29/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-11-26 00:43:04,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:43:04,844 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:43:04,859 WARN L237 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_98dc89f4-7eef-4ce9-bab3-de6814079e29/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-11-26 00:43:04,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:43:04,890 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:43:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04 WrapperNode [2022-11-26 00:43:04,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:43:04,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:43:04,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:43:04,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:43:04,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,940 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2022-11-26 00:43:04,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:43:04,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:43:04,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:43:04,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:43:04,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:43:04,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:43:04,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:43:04,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:43:04,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (1/1) ... [2022-11-26 00:43:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:43:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:05,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:43:05,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:43:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:43:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:43:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:43:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:43:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:43:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:43:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:43:05,166 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:43:05,168 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:43:05,422 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:43:05,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:43:05,586 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-26 00:43:05,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:43:05 BoogieIcfgContainer [2022-11-26 00:43:05,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:43:05,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:43:05,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:43:05,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:43:05,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:43:04" (1/3) ... [2022-11-26 00:43:05,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f09a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:43:05, skipping insertion in model container [2022-11-26 00:43:05,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:04" (2/3) ... [2022-11-26 00:43:05,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f09a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:43:05, skipping insertion in model container [2022-11-26 00:43:05,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:43:05" (3/3) ... [2022-11-26 00:43:05,601 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2022-11-26 00:43:05,623 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:43:05,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:43:05,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:43:05,731 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f08251f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:43:05,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:43:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:43:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:43:05,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:05,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:05,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 825226196, now seen corresponding path program 1 times [2022-11-26 00:43:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123861169] [2022-11-26 00:43:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:05,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:06,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123861169] [2022-11-26 00:43:06,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123861169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:06,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:06,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:43:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313488310] [2022-11-26 00:43:06,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:06,229 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:06,400 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2022-11-26 00:43:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:43:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:06,410 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:43:06,411 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:43:06,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:06,418 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:06,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:43:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2022-11-26 00:43:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:43:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-11-26 00:43:06,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2022-11-26 00:43:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:06,466 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-11-26 00:43:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-11-26 00:43:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:43:06,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:06,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:06,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:43:06,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash -224566578, now seen corresponding path program 1 times [2022-11-26 00:43:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149978202] [2022-11-26 00:43:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:06,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149978202] [2022-11-26 00:43:06,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149978202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926040666] [2022-11-26 00:43:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:06,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:06,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:43:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:06,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:06,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926040666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:06,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770979506] [2022-11-26 00:43:06,784 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:43:06,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:06,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:06,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:06,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:06,882 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:43:06,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:43:06,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:06,917 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:06,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:06,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:43:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:07,131 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:43:07,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:43:07,264 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:07,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:07,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1770979506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:07,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:07,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2022-11-26 00:43:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651707779] [2022-11-26 00:43:07,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:43:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:43:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:43:07,323 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:07,400 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2022-11-26 00:43:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:43:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:43:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:07,402 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:43:07,402 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:43:07,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:43:07,404 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:07,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:43:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:43:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-26 00:43:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-26 00:43:07,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2022-11-26 00:43:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:07,421 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-26 00:43:07,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-26 00:43:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:43:07,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:07,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:07,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:07,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -747487474, now seen corresponding path program 1 times [2022-11-26 00:43:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:07,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938726357] [2022-11-26 00:43:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:43:07,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938726357] [2022-11-26 00:43:07,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938726357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344827674] [2022-11-26 00:43:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:07,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:07,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:07,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:43:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:43:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:43:07,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:07,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344827674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:07,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:07,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:43:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599004924] [2022-11-26 00:43:07,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:07,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:07,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:07,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:07,879 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:07,942 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-26 00:43:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:43:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:07,948 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:43:07,949 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:43:07,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:07,950 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:07,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:43:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:43:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-26 00:43:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-26 00:43:07,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2022-11-26 00:43:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:07,957 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-26 00:43:07,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-26 00:43:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:43:07,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:07,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:07,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:43:08,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:08,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1790313624, now seen corresponding path program 1 times [2022-11-26 00:43:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:08,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490228917] [2022-11-26 00:43:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:43:08,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490228917] [2022-11-26 00:43:08,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490228917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334504746] [2022-11-26 00:43:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:08,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:08,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:43:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:43:08,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:43:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334504746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63641691] [2022-11-26 00:43:08,408 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:43:08,408 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:08,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:08,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:08,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:08,445 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:08,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:08,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:08,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:08,580 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:08,716 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:08,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:08,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:08,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 00:43:08,830 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:43:08,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 119 [2022-11-26 00:43:08,915 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:08,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:43:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-26 00:43:09,284 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-26 00:43:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-26 00:43:09,814 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-26 00:43:09,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-26 00:43:10,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [63641691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-26 00:43:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817615490] [2022-11-26 00:43:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:10,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:43:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:43:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:43:10,959 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:11,287 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-11-26 00:43:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:43:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:43:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:11,289 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:43:11,289 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:43:11,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:43:11,290 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:11,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:43:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-11-26 00:43:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-26 00:43:11,300 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2022-11-26 00:43:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:11,300 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-26 00:43:11,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-26 00:43:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:43:11,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:11,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:11,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:11,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:11,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 457595505, now seen corresponding path program 1 times [2022-11-26 00:43:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906106952] [2022-11-26 00:43:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:11,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906106952] [2022-11-26 00:43:11,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906106952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688512543] [2022-11-26 00:43:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:11,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:11,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:43:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:11,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:11,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688512543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346576326] [2022-11-26 00:43:11,701 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:11,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:11,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:11,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:11,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:11,753 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:11,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:11,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:11,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:11,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:11,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:11,894 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:11,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:11,988 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:12,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:12,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:12,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:12,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:12,119 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:12,304 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:12,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:12,681 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:12,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:12,987 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:12,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:13,205 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:13,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:13,311 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:13,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:14,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 4))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:14,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:14,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:14,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 00:43:14,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588372779] [2022-11-26 00:43:14,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:14,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:43:14,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:43:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:43:14,293 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:14,364 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-26 00:43:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:43:14,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:43:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:14,365 INFO L225 Difference]: With dead ends: 66 [2022-11-26 00:43:14,365 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:43:14,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:43:14,367 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:14,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:43:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2022-11-26 00:43:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-26 00:43:14,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2022-11-26 00:43:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:14,376 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-26 00:43:14,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-26 00:43:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:43:14,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:14,377 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:14,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:14,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 930745131, now seen corresponding path program 2 times [2022-11-26 00:43:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:14,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066993227] [2022-11-26 00:43:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:43:14,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066993227] [2022-11-26 00:43:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066993227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757537533] [2022-11-26 00:43:14,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:14,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:43:14,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:43:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:43:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:43:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757537533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785291888] [2022-11-26 00:43:14,821 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:14,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:14,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:14,822 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:14,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:14,852 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:14,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:14,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:14,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:43:14,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:14,942 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:43:14,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:43:14,983 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:14,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:15,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:15,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:15,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:15,089 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:15,301 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:15,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:15,829 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:15,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:16,084 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:16,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:16,765 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:16,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:17,039 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:17,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:17,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1109#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 4))) 1 0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:17,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:17,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:17,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:43:17,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016788143] [2022-11-26 00:43:17,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:17,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:43:17,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:43:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:43:17,990 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:18,077 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-11-26 00:43:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:43:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:43:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:18,078 INFO L225 Difference]: With dead ends: 66 [2022-11-26 00:43:18,078 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:43:18,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:43:18,080 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:18,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:43:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-26 00:43:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-11-26 00:43:18,091 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2022-11-26 00:43:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:18,091 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-11-26 00:43:18,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-11-26 00:43:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:43:18,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:18,092 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:18,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:43:18,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1985012685, now seen corresponding path program 3 times [2022-11-26 00:43:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208698753] [2022-11-26 00:43:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:18,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:18,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208698753] [2022-11-26 00:43:18,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208698753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:18,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138239272] [2022-11-26 00:43:18,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:43:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:18,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:18,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:43:18,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:43:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:43:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:18,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:18,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138239272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:18,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406738522] [2022-11-26 00:43:18,756 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:18,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:18,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:18,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:18,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,789 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:43:18,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:43:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,817 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:18,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:18,922 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:18,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:19,006 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:19,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:19,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:19,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:19,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:19,112 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:19,286 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:19,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:19,746 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:19,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:19,963 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:19,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:20,611 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:20,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:20,806 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:20,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:21,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1516#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) 4))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:21,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:21,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:21,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-26 00:43:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161340193] [2022-11-26 00:43:21,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:21,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:43:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:43:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:43:21,697 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:21,835 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2022-11-26 00:43:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:43:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-26 00:43:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:21,837 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:43:21,837 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 00:43:21,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:43:21,838 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:21,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 00:43:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-11-26 00:43:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-26 00:43:21,853 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2022-11-26 00:43:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:21,853 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-26 00:43:21,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-26 00:43:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:43:21,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:21,854 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:21,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:22,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:22,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash 27316621, now seen corresponding path program 4 times [2022-11-26 00:43:22,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:22,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787574312] [2022-11-26 00:43:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:22,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:22,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787574312] [2022-11-26 00:43:22,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787574312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528371107] [2022-11-26 00:43:22,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:43:22,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:22,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:22,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:43:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:43:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:22,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528371107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636222747] [2022-11-26 00:43:22,729 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:22,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:22,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:22,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:22,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:22,753 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:43:22,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:43:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:22,780 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:22,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:22,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:22,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:22,857 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:22,916 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:22,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:22,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:22,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:22,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:23,022 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:23,194 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:23,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:23,475 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:23,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:23,776 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:23,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:23,988 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:23,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:24,075 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:24,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:24,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:24,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:24,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:24,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-26 00:43:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60537136] [2022-11-26 00:43:24,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:43:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:43:24,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:43:24,986 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:25,326 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2022-11-26 00:43:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:43:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-26 00:43:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:25,330 INFO L225 Difference]: With dead ends: 190 [2022-11-26 00:43:25,330 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:43:25,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:43:25,333 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:25,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 67 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:43:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:43:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2022-11-26 00:43:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-26 00:43:25,371 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2022-11-26 00:43:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:25,371 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-26 00:43:25,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-26 00:43:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:43:25,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:25,381 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:25,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:25,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:43:25,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1554989811, now seen corresponding path program 5 times [2022-11-26 00:43:25,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:25,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253512290] [2022-11-26 00:43:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:43:26,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:26,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253512290] [2022-11-26 00:43:26,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253512290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309220160] [2022-11-26 00:43:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:26,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:43:26,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:43:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:26,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:43:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:43:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:43:26,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309220160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516017957] [2022-11-26 00:43:26,754 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:26,754 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:26,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:26,755 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:26,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:26,780 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:26,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:26,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:26,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:26,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:26,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:26,866 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:26,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:26,926 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:26,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:26,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:26,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:26,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:27,019 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:27,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:27,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:27,209 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:27,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:27,525 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:27,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:27,855 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:27,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:28,188 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:28,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:28,337 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:28,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:29,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2896#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 0))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:29,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:29,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-26 00:43:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286560422] [2022-11-26 00:43:29,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:43:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:43:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:43:29,378 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:29,970 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2022-11-26 00:43:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:43:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-26 00:43:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:29,973 INFO L225 Difference]: With dead ends: 245 [2022-11-26 00:43:29,973 INFO L226 Difference]: Without dead ends: 206 [2022-11-26 00:43:29,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=966, Invalid=2340, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:43:29,976 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 581 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:29,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 101 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:43:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-26 00:43:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2022-11-26 00:43:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-11-26 00:43:30,020 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2022-11-26 00:43:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:30,021 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-11-26 00:43:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-11-26 00:43:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:43:30,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:30,022 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:30,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:30,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:30,228 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1036958695, now seen corresponding path program 6 times [2022-11-26 00:43:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047756092] [2022-11-26 00:43:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:31,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047756092] [2022-11-26 00:43:31,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047756092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379983544] [2022-11-26 00:43:31,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:43:31,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:31,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:31,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:31,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:43:31,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:43:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:31,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:43:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:31,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:32,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379983544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095370982] [2022-11-26 00:43:32,387 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:32,387 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:32,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:32,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:32,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:32,414 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:32,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:32,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:32,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:32,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:32,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:32,529 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:32,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:32,592 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:32,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:32,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:32,686 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:32,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:32,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:32,848 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:32,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:33,117 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:33,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:33,413 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:33,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:34,005 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:34,294 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:34,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:35,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4074#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 0))) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:35,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:35,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:35,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-26 00:43:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642263100] [2022-11-26 00:43:35,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:43:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:43:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1760, Invalid=2272, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:43:35,228 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:35,935 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2022-11-26 00:43:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-26 00:43:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-26 00:43:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:35,939 INFO L225 Difference]: With dead ends: 416 [2022-11-26 00:43:35,940 INFO L226 Difference]: Without dead ends: 329 [2022-11-26 00:43:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1760, Invalid=2272, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:43:35,945 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 485 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:35,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 86 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:43:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-26 00:43:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2022-11-26 00:43:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2022-11-26 00:43:35,997 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2022-11-26 00:43:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:35,997 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2022-11-26 00:43:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2022-11-26 00:43:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:43:36,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:36,000 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:36,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:36,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:43:36,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:36,207 INFO L85 PathProgramCache]: Analyzing trace with hash -758359635, now seen corresponding path program 7 times [2022-11-26 00:43:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:36,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860158912] [2022-11-26 00:43:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:38,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860158912] [2022-11-26 00:43:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860158912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613923332] [2022-11-26 00:43:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:43:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:38,842 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:38,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:43:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:43:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:42,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613923332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:42,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064807318] [2022-11-26 00:43:42,260 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:42,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:42,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:42,261 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:42,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:42,294 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:42,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:42,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:43:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:42,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:43:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:42,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:42,380 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:43:42,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:43:42,442 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:42,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:42,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:42,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:42,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:42,538 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:42,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:42,708 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:42,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:43,002 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:43,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:43,214 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:43,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:43,432 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:43,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:43,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:44,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5793#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:44,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:44,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:44,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-26 00:43:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222763877] [2022-11-26 00:43:44,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:44,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-26 00:43:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-26 00:43:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5985, Invalid=6897, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:43:44,551 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:47,131 INFO L93 Difference]: Finished difference Result 666 states and 973 transitions. [2022-11-26 00:43:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:43:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-26 00:43:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:47,135 INFO L225 Difference]: With dead ends: 666 [2022-11-26 00:43:47,135 INFO L226 Difference]: Without dead ends: 579 [2022-11-26 00:43:47,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5985, Invalid=6897, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:43:47,140 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1109 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:47,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 129 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:43:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-26 00:43:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 187. [2022-11-26 00:43:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:43:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2022-11-26 00:43:47,193 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 100 [2022-11-26 00:43:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:47,196 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2022-11-26 00:43:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2022-11-26 00:43:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:43:47,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:47,203 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:47,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:43:47,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash 622135021, now seen corresponding path program 8 times [2022-11-26 00:43:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:47,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651639067] [2022-11-26 00:43:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:43:55,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651639067] [2022-11-26 00:43:55,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651639067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959138812] [2022-11-26 00:43:55,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:55,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:55,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:55,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:43:55,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:43:55,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:43:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:55,833 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:43:55,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-26 00:43:55,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:43:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 4998 trivial. 0 not checked. [2022-11-26 00:43:56,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2022-11-26 00:43:56,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959138812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:56,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468223251] [2022-11-26 00:43:56,912 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:43:56,912 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:56,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:56,912 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:56,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:56,935 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:43:56,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:43:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:56,961 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:43:56,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:43:56,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:56,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:43:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:57,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:57,028 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:43:57,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:43:57,062 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:57,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:43:57,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:43:57,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:57,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-11-26 00:43:57,150 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:43:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:57,320 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:43:57,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-26 00:43:57,553 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:43:57,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:43:57,895 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:57,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:58,276 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:43:58,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:43:58,481 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:43:58,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:59,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8374#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:59,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:59,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:43:59,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9, 7] total 113 [2022-11-26 00:43:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143377069] [2022-11-26 00:43:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-26 00:43:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-26 00:43:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6045, Invalid=9705, Unknown=0, NotChecked=0, Total=15750 [2022-11-26 00:43:59,824 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,889 INFO L93 Difference]: Finished difference Result 813 states and 1128 transitions. [2022-11-26 00:44:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2022-11-26 00:44:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-11-26 00:44:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,894 INFO L225 Difference]: With dead ends: 813 [2022-11-26 00:44:22,894 INFO L226 Difference]: Without dead ends: 717 [2022-11-26 00:44:22,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29469 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=30130, Invalid=85810, Unknown=0, NotChecked=0, Total=115940 [2022-11-26 00:44:22,907 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1341 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 841 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:44:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-11-26 00:44:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 212. [2022-11-26 00:44:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.2679425837320575) internal successors, (265), 209 states have internal predecessors, (265), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 267 transitions. [2022-11-26 00:44:23,032 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 267 transitions. Word has length 150 [2022-11-26 00:44:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:23,032 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 267 transitions. [2022-11-26 00:44:23,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 267 transitions. [2022-11-26 00:44:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-26 00:44:23,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:23,035 INFO L195 NwaCegarLoop]: trace histogram [99, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:23,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:44:23,241 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1355029692, now seen corresponding path program 1 times [2022-11-26 00:44:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586708608] [2022-11-26 00:44:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-26 00:44:31,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:31,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586708608] [2022-11-26 00:44:31,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586708608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:31,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665383835] [2022-11-26 00:44:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:31,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:31,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:31,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:44:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-26 00:44:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-26 00:44:31,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-26 00:44:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665383835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694054901] [2022-11-26 00:44:44,780 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:44,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:44,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:44,781 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:44,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:44,816 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:44,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:44,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:44,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:44:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:44,912 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:44:44,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:44:44,948 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:44:44,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:44,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:44:44,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 00:44:45,017 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:44:45,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 119 [2022-11-26 00:44:45,066 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:44:45,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:45,125 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:44:45,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:44:45,224 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:45,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:44:45,375 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:45,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:44:45,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2022-11-26 00:44:45,498 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:47,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11802#(and (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 0))) 1 0)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (< 1 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| 4))) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (+ (- 4) (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| 4)))) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| 2147483647) (<= 0 |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:47,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:47,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:47,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-26 00:44:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084090629] [2022-11-26 00:44:47,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-26 00:44:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-26 00:44:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22358, Invalid=24082, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 00:44:47,645 INFO L87 Difference]: Start difference. First operand 212 states and 267 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:09,327 INFO L93 Difference]: Finished difference Result 1224 states and 1834 transitions. [2022-11-26 00:45:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-26 00:45:09,328 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-26 00:45:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:09,334 INFO L225 Difference]: With dead ends: 1224 [2022-11-26 00:45:09,334 INFO L226 Difference]: Without dead ends: 1113 [2022-11-26 00:45:09,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5228 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=22358, Invalid=24082, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 00:45:09,338 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 2005 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 1441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1441 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:09,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 273 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1441 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:45:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-11-26 00:45:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 313. [2022-11-26 00:45:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 310 states have (on average 1.1806451612903226) internal successors, (366), 310 states have internal predecessors, (366), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:45:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 368 transitions. [2022-11-26 00:45:09,461 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 368 transitions. Word has length 152 [2022-11-26 00:45:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:09,462 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 368 transitions. [2022-11-26 00:45:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 368 transitions. [2022-11-26 00:45:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-26 00:45:09,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:09,466 INFO L195 NwaCegarLoop]: trace histogram [200, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:09,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:09,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:09,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash 532462902, now seen corresponding path program 2 times [2022-11-26 00:45:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582654313] [2022-11-26 00:45:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-26 00:45:36,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582654313] [2022-11-26 00:45:36,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582654313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766830183] [2022-11-26 00:45:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:45:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:36,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:36,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:36,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dc89f4-7eef-4ce9-bab3-de6814079e29/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:45:37,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:45:37,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:45:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:45:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:38,474 INFO L321 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-11-26 00:45:38,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 54 [2022-11-26 00:45:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:39,129 INFO L321 Elim1Store]: treesize reduction 37, result has 71.5 percent of original size [2022-11-26 00:45:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 130 [2022-11-26 00:45:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 20272 trivial. 0 not checked. [2022-11-26 00:45:39,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:42,455 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:45:42,455 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 1 [2022-11-26 00:45:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 20272 trivial. 0 not checked. [2022-11-26 00:45:42,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766830183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394263255] [2022-11-26 00:45:42,466 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:45:42,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:42,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:42,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:42,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:42,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:42,492 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:45:42,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:45:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:42,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:45:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:42,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:45:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:42,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:42,568 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:45:42,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:45:42,598 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:45:42,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:45:42,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:45:42,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 00:45:42,673 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:45:42,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 119 [2022-11-26 00:45:42,722 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-26 00:45:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:42,771 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:45:42,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-26 00:45:42,871 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:45:42,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:45:42,992 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:45:42,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:45:43,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:45:43,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:44,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16353#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 0))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:45:44,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:44,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:45:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 12, 12] total 223 [2022-11-26 00:45:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872027550] [2022-11-26 00:45:44,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2022-11-26 00:45:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2022-11-26 00:45:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22851, Invalid=32609, Unknown=0, NotChecked=0, Total=55460 [2022-11-26 00:45:44,833 INFO L87 Difference]: Start difference. First operand 313 states and 368 transitions. Second operand has 223 states, 222 states have (on average 1.1441441441441442) internal successors, (254), 221 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:46,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:46:48,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]