./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- 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 [2022-11-25 22:13:20,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:13:20,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:13:20,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:13:20,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:13:20,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:13:20,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:13:20,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:13:20,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:13:20,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:13:20,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:13:20,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:13:20,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:13:20,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:13:20,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:13:20,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:13:20,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:13:20,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:13:20,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:13:20,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:13:20,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:13:20,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:13:20,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:13:20,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:13:20,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:13:20,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:13:20,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:13:20,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:13:20,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:13:20,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:13:20,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:13:20,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:13:20,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:13:20,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:13:20,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:13:20,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:13:20,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:13:20,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:13:20,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:13:20,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:13:20,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:13:20,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:13:20,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:13:20,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:13:20,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:13:20,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:13:20,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:13:20,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:13:20,321 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:13:20,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:13:20,323 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:13:20,323 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:13:20,324 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:13:20,325 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:13:20,325 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:13:20,325 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:13:20,326 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:13:20,326 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:13:20,326 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:13:20,326 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:13:20,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:13:20,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:13:20,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:13:20,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:13:20,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:13:20,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:13:20,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:13:20,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:13:20,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:13:20,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:13:20,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:13:20,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:13:20,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:13:20,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:13:20,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:20,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:13:20,333 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:13:20,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:13:20,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:13:20,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:13:20,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:13:20,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:13:20,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:13:20,334 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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2022-11-25 22:13:20,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:13:20,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:13:20,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:13:20,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:13:20,708 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:13:20,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-11-25 22:13:23,950 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:13:24,227 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:13:24,228 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-11-25 22:13:24,236 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/data/988371138/e63966ad06f347dd9bc906fc389651b3/FLAG449ed2769 [2022-11-25 22:13:24,258 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/data/988371138/e63966ad06f347dd9bc906fc389651b3 [2022-11-25 22:13:24,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:13:24,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:13:24,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:24,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:13:24,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:13:24,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbf3b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24, skipping insertion in model container [2022-11-25 22:13:24,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:13:24,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:13:24,467 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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-11-25 22:13:24,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:24,496 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:13:24,512 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_3fdf9d8d-3c03-4191-9fbc-b551947961ee/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-11-25 22:13:24,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:24,538 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:13:24,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24 WrapperNode [2022-11-25 22:13:24,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:24,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:24,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:13:24,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:13:24,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,578 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-11-25 22:13:24,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:24,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:13:24,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:13:24,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:13:24,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:13:24,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:13:24,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:13:24,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:13:24,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (1/1) ... [2022-11-25 22:13:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:24,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:13:24,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:13:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:13:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:13:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:13:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:13:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:13:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:13:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:13:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:13:24,824 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:13:24,827 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:13:25,055 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:13:25,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:13:25,099 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:13:25,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:13:25 BoogieIcfgContainer [2022-11-25 22:13:25,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:13:25,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:13:25,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:13:25,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:13:25,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:13:24" (1/3) ... [2022-11-25 22:13:25,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c36567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:13:25, skipping insertion in model container [2022-11-25 22:13:25,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:24" (2/3) ... [2022-11-25 22:13:25,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c36567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:13:25, skipping insertion in model container [2022-11-25 22:13:25,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:13:25" (3/3) ... [2022-11-25 22:13:25,123 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2022-11-25 22:13:25,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:13:25,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:13:25,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:13:25,268 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;@2953964f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:13:25,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:13:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:13:25,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:25,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:13:25,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1868223123, now seen corresponding path program 1 times [2022-11-25 22:13:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074841425] [2022-11-25 22:13:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:25,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:25,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:25,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074841425] [2022-11-25 22:13:25,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074841425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:25,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:25,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296903409] [2022-11-25 22:13:25,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:25,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:13:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:13:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:25,764 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:25,843 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-25 22:13:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:13:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:13:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:25,924 INFO L225 Difference]: With dead ends: 26 [2022-11-25 22:13:25,924 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 22:13:25,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:25,933 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:25,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 22:13:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-11-25 22:13:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-25 22:13:25,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-25 22:13:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:26,000 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-25 22:13:26,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-25 22:13:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:13:26,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:26,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:26,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:13:26,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 947313280, now seen corresponding path program 1 times [2022-11-25 22:13:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:26,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377241487] [2022-11-25 22:13:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:26,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:26,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377241487] [2022-11-25 22:13:26,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377241487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:26,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:26,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:13:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909678542] [2022-11-25 22:13:26,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:26,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:26,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:26,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:13:26,185 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:26,251 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-11-25 22:13:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:13:26,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:13:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:26,253 INFO L225 Difference]: With dead ends: 18 [2022-11-25 22:13:26,253 INFO L226 Difference]: Without dead ends: 11 [2022-11-25 22:13:26,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:13:26,256 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:26,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-25 22:13:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-25 22:13:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-25 22:13:26,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-25 22:13:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:26,263 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-25 22:13:26,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-25 22:13:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:13:26,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:26,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:26,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:13:26,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash 362824998, now seen corresponding path program 1 times [2022-11-25 22:13:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47421595] [2022-11-25 22:13:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:26,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47421595] [2022-11-25 22:13:26,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47421595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:26,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482775575] [2022-11-25 22:13:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:26,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:26,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:26,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:26,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:13:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:13:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482775575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:26,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658232165] [2022-11-25 22:13:26,769 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:13:26,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:26,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:26,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:26,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:26,929 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:13:26,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:13:26,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:27,014 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:27,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:27,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:27,445 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:27,447 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 246 treesize of output 250 [2022-11-25 22:13:27,710 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 19 treesize of output 16 [2022-11-25 22:13:27,773 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 19 treesize of output 16 [2022-11-25 22:13:27,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:28,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~k~0#1| 4) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem7#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:28,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:28,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:28,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-25 22:13:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714196426] [2022-11-25 22:13:28,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:28,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:13:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:13:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:13:28,602 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:28,716 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-25 22:13:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:13:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:13:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:28,718 INFO L225 Difference]: With dead ends: 36 [2022-11-25 22:13:28,718 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 22:13:28,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:13:28,721 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:28,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 22:13:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2022-11-25 22:13:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 22:13:28,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-25 22:13:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:28,728 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 22:13:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 22:13:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:13:28,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:28,729 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:28,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:28,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:28,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1925995406, now seen corresponding path program 1 times [2022-11-25 22:13:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:28,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990897498] [2022-11-25 22:13:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:29,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:29,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990897498] [2022-11-25 22:13:29,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990897498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56063118] [2022-11-25 22:13:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:29,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:29,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:29,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:13:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:13:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:29,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:29,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56063118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:29,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835239437] [2022-11-25 22:13:29,340 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:13:29,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:29,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:29,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:29,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:29,428 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:13:29,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:13:29,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:29,503 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:29,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:29,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:29,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:29,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:29,694 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:29,694 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 246 treesize of output 250 [2022-11-25 22:13:29,881 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 19 treesize of output 16 [2022-11-25 22:13:29,957 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 19 treesize of output 16 [2022-11-25 22:13:29,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:30,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '301#(and (= |ULTIMATE.start_main_~k~0#1| 4) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem7#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:30,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:30,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:30,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 22:13:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797653664] [2022-11-25 22:13:30,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:13:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:13:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:13:30,641 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:30,721 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-11-25 22:13:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:13:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:13:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:30,723 INFO L225 Difference]: With dead ends: 30 [2022-11-25 22:13:30,723 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 22:13:30,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:13:30,725 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:30,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 22:13:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 22:13:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-25 22:13:30,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-11-25 22:13:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:30,732 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-25 22:13:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-25 22:13:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:13:30,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:30,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:30,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:30,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1372708234, now seen corresponding path program 2 times [2022-11-25 22:13:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:30,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981502235] [2022-11-25 22:13:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:31,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981502235] [2022-11-25 22:13:31,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981502235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848850406] [2022-11-25 22:13:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:31,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:31,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:31,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:31,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:13:31,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 22:13:31,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:13:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:31,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:31,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848850406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:31,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226548352] [2022-11-25 22:13:31,587 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:13:31,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:31,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:31,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:31,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:31,647 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:13:31,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:13:31,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:31,707 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:31,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:31,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2022-11-25 22:13:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:31,880 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-25 22:13:31,881 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 255 treesize of output 253 [2022-11-25 22:13:31,993 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 19 treesize of output 16 [2022-11-25 22:13:32,028 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 19 treesize of output 16 [2022-11-25 22:13:32,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:32,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~k~0#1| 4) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem7#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:32,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:32,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:32,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-25 22:13:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821555039] [2022-11-25 22:13:32,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:13:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:13:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:13:32,642 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:32,748 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-11-25 22:13:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:13:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 22:13:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:32,750 INFO L225 Difference]: With dead ends: 80 [2022-11-25 22:13:32,750 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 22:13:32,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:13:32,752 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:32,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 22:13:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 32. [2022-11-25 22:13:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-25 22:13:32,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-11-25 22:13:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:32,768 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-25 22:13:32,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-25 22:13:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:13:32,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:32,770 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:32,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:32,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1663029757, now seen corresponding path program 2 times [2022-11-25 22:13:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:32,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423910695] [2022-11-25 22:13:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:33,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423910695] [2022-11-25 22:13:33,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423910695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963472205] [2022-11-25 22:13:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:33,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:33,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:33,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:13:33,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 22:13:33,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:33,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 22:13:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:33,733 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 15 treesize of output 11 [2022-11-25 22:13:33,904 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:13:33,905 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 25 treesize of output 12 [2022-11-25 22:13:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:33,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:34,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 22:13:34,083 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 30 treesize of output 24 [2022-11-25 22:13:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:34,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963472205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236842368] [2022-11-25 22:13:34,402 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:13:34,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:34,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:34,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:34,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:34,448 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:13:34,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:13:34,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:34,502 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:34,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:34,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:34,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:34,674 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:34,675 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 242 treesize of output 246 [2022-11-25 22:13:34,786 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 19 treesize of output 16 [2022-11-25 22:13:34,818 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 19 treesize of output 16 [2022-11-25 22:13:34,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:35,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '760#(and (= |ULTIMATE.start_main_~k~0#1| 4) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem7#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:35,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:35,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:35,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 22:13:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678034834] [2022-11-25 22:13:35,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:13:35,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:13:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:13:35,552 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:35,883 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-25 22:13:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:13:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 22:13:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:35,886 INFO L225 Difference]: With dead ends: 40 [2022-11-25 22:13:35,886 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 22:13:35,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:13:35,888 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:35,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 22:13:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-25 22:13:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-25 22:13:35,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2022-11-25 22:13:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:35,896 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-25 22:13:35,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-25 22:13:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:13:35,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:35,897 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:35,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:36,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:36,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1111570602, now seen corresponding path program 3 times [2022-11-25 22:13:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753885441] [2022-11-25 22:13:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:36,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:36,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753885441] [2022-11-25 22:13:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753885441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224583359] [2022-11-25 22:13:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:13:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:36,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:13:36,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:13:36,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 22:13:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:36,744 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 15 treesize of output 11 [2022-11-25 22:13:36,805 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-25 22:13:36,806 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 29 treesize of output 28 [2022-11-25 22:13:36,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-25 22:13:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:36,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:36,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:13:36,983 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 130 treesize of output 122 [2022-11-25 22:13:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:37,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224583359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088599719] [2022-11-25 22:13:37,205 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:13:37,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:37,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:37,206 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:37,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:37,244 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:13:37,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:13:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:37,288 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:37,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:37,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:37,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:37,433 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:37,433 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 246 treesize of output 250 [2022-11-25 22:13:37,516 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 19 treesize of output 16 [2022-11-25 22:13:37,567 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 19 treesize of output 16 [2022-11-25 22:13:37,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:38,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1008#(and (= |ULTIMATE.start_main_~k~0#1| 4) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem7#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:38,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:38,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-25 22:13:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298062973] [2022-11-25 22:13:38,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:13:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:13:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:13:38,209 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:38,509 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-25 22:13:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:13:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 22:13:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:38,510 INFO L225 Difference]: With dead ends: 38 [2022-11-25 22:13:38,510 INFO L226 Difference]: Without dead ends: 36 [2022-11-25 22:13:38,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:13:38,511 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:38,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-25 22:13:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-25 22:13:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-25 22:13:38,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 19 [2022-11-25 22:13:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:38,519 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-25 22:13:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-25 22:13:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 22:13:38,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:38,520 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:38,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 22:13:38,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:38,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 607075178, now seen corresponding path program 1 times [2022-11-25 22:13:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79428407] [2022-11-25 22:13:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:39,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79428407] [2022-11-25 22:13:39,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79428407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803360544] [2022-11-25 22:13:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:39,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:39,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:39,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:13:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 22:13:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:39,500 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 13 treesize of output 9 [2022-11-25 22:13:39,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-25 22:13:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:39,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:39,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:13:39,763 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 24 treesize of output 20 [2022-11-25 22:13:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:39,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803360544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:39,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448418257] [2022-11-25 22:13:39,996 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:13:39,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:39,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:39,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:39,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:40,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:40,040 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:40,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:13:40,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:40,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:40,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:40,158 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:40,159 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 246 treesize of output 250 [2022-11-25 22:13:40,236 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 19 treesize of output 16 [2022-11-25 22:13:40,330 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 19 treesize of output 16 [2022-11-25 22:13:40,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:40,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1282#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 4 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:40,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:40,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:40,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-25 22:13:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659822449] [2022-11-25 22:13:40,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 22:13:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 22:13:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:13:40,938 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:41,618 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-25 22:13:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:13:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-25 22:13:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:41,620 INFO L225 Difference]: With dead ends: 46 [2022-11-25 22:13:41,620 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 22:13:41,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:13:41,621 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:41,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 103 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:13:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 22:13:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-25 22:13:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-25 22:13:41,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2022-11-25 22:13:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:41,629 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-25 22:13:41,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-25 22:13:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:13:41,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:41,630 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:41,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:41,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:41,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash -522338013, now seen corresponding path program 2 times [2022-11-25 22:13:41,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:41,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328777155] [2022-11-25 22:13:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:42,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328777155] [2022-11-25 22:13:42,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328777155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788748030] [2022-11-25 22:13:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:42,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:13:42,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 22:13:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:13:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:42,604 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 [2022-11-25 22:13:42,658 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 36 treesize of output 29 [2022-11-25 22:13:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:42,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:13:42,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 40 [2022-11-25 22:13:42,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:13:42,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2022-11-25 22:13:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:43,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-25 22:13:43,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:13:43,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 671 treesize of output 651 [2022-11-25 22:13:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:44,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788748030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:44,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417321475] [2022-11-25 22:13:44,141 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:13:44,141 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:44,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:44,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:44,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:44,183 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:44,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:44,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:13:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:44,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:44,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:44,298 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-25 22:13:44,299 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 242 treesize of output 246 [2022-11-25 22:13:44,431 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 19 treesize of output 16 [2022-11-25 22:13:44,552 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 19 treesize of output 16 [2022-11-25 22:13:44,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:45,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1593#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 4 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:45,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:45,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:45,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 36 [2022-11-25 22:13:45,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717777570] [2022-11-25 22:13:45,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 22:13:45,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 22:13:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 22:13:45,435 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:45,910 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-25 22:13:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:13:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 22:13:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:45,912 INFO L225 Difference]: With dead ends: 41 [2022-11-25 22:13:45,912 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 22:13:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 22:13:45,914 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 60 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:13:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 22:13:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-25 22:13:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-25 22:13:45,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-11-25 22:13:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:45,922 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-25 22:13:45,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-25 22:13:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 22:13:45,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:45,924 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 22:13:45,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 22:13:46,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:46,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash -300108719, now seen corresponding path program 3 times [2022-11-25 22:13:46,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:46,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055082866] [2022-11-25 22:13:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:46,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:46,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055082866] [2022-11-25 22:13:46,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055082866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:46,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099244271] [2022-11-25 22:13:46,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:13:46,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:46,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:46,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:13:46,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:13:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 22:13:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:46,838 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 [2022-11-25 22:13:46,877 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-25 22:13:46,964 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-25 22:13:46,964 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 34 treesize of output 43 [2022-11-25 22:13:47,735 INFO L321 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-11-25 22:13:47,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 40 [2022-11-25 22:13:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:47,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:52,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2022-11-25 22:13:52,487 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 22:13:52,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 525 treesize of output 507 [2022-11-25 22:13:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:52,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099244271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:52,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383762012] [2022-11-25 22:13:52,808 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:13:52,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:52,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:52,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:52,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:52,856 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:13:52,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:13:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:52,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:13:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:52,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-25 22:13:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:52,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:52,973 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-25 22:13:52,974 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 249 treesize of output 247 [2022-11-25 22:13:53,057 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 19 treesize of output 16 [2022-11-25 22:13:53,170 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 19 treesize of output 16 [2022-11-25 22:13:53,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:54,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1917#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 4 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:13:54,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:54,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:54,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-11-25 22:13:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565497122] [2022-11-25 22:13:54,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:54,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:13:54,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:13:54,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1569, Unknown=2, NotChecked=0, Total=1806 [2022-11-25 22:13:54,234 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:55,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:13:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:59,707 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-11-25 22:13:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 22:13:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-25 22:13:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:59,709 INFO L225 Difference]: With dead ends: 60 [2022-11-25 22:13:59,709 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 22:13:59,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=600, Invalid=3558, Unknown=2, NotChecked=0, Total=4160 [2022-11-25 22:13:59,711 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:59,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 450 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 22:13:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 22:13:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-25 22:13:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-25 22:13:59,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2022-11-25 22:13:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:59,722 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-25 22:13:59,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-25 22:13:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:13:59,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:59,724 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 22:13:59,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:59,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:13:59,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:13:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1879384671, now seen corresponding path program 4 times [2022-11-25 22:13:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:59,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051771653] [2022-11-25 22:13:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:00,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051771653] [2022-11-25 22:14:00,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051771653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274977139] [2022-11-25 22:14:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:14:00,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:00,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:00,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:14:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:14:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:01,079 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 13 treesize of output 9 [2022-11-25 22:14:01,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:01,130 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 27 treesize of output 26 [2022-11-25 22:14:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:01,184 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 27 treesize of output 26 [2022-11-25 22:14:01,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-25 22:14:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:01,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:04,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-25 22:14:04,711 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 1106 treesize of output 1074 [2022-11-25 22:14:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274977139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062335632] [2022-11-25 22:14:05,838 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:14:05,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:05,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:05,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:05,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:05,880 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:14:05,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:14:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:05,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:14:05,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:05,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2022-11-25 22:14:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:05,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:05,994 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-25 22:14:05,995 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 255 treesize of output 253 [2022-11-25 22:14:06,056 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 19 treesize of output 16 [2022-11-25 22:14:06,144 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 19 treesize of output 16 [2022-11-25 22:14:06,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:06,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2327#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 4 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:14:06,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:06,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:06,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-25 22:14:06,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57904978] [2022-11-25 22:14:06,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:06,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 22:14:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 22:14:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2262, Unknown=5, NotChecked=0, Total=2450 [2022-11-25 22:14:06,901 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:07,566 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-25 22:14:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:14:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-25 22:14:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:07,567 INFO L225 Difference]: With dead ends: 44 [2022-11-25 22:14:07,567 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 22:14:07,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=311, Invalid=3106, Unknown=5, NotChecked=0, Total=3422 [2022-11-25 22:14:07,569 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:07,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 22:14:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-11-25 22:14:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-25 22:14:07,580 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2022-11-25 22:14:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:07,581 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-25 22:14:07,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-25 22:14:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:14:07,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:07,582 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 22:14:07,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 22:14:07,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:07,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash -439813739, now seen corresponding path program 5 times [2022-11-25 22:14:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:07,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946858026] [2022-11-25 22:14:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:08,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946858026] [2022-11-25 22:14:08,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946858026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979170817] [2022-11-25 22:14:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:14:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:08,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:08,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:14:08,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 22:14:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:14:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:08,805 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 15 treesize of output 11 [2022-11-25 22:14:08,877 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-25 22:14:08,878 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 29 treesize of output 28 [2022-11-25 22:14:09,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-25 22:14:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:09,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:14:09,417 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 58 treesize of output 54 [2022-11-25 22:14:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:09,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979170817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:09,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30909313] [2022-11-25 22:14:09,799 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:14:09,799 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:09,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:09,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:09,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,838 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:14:09,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:14:09,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,876 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:14:09,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:14:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2022-11-25 22:14:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,976 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-25 22:14:09,977 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 255 treesize of output 253 [2022-11-25 22:14:10,043 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 19 treesize of output 16 [2022-11-25 22:14:10,113 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 19 treesize of output 16 [2022-11-25 22:14:10,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:10,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2709#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 4 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (<= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2022-11-25 22:14:10,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:10,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:10,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-11-25 22:14:10,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608765433] [2022-11-25 22:14:10,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:10,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 22:14:10,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 22:14:10,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2003, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 22:14:10,801 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:11,779 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-25 22:14:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:14:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-25 22:14:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:11,780 INFO L225 Difference]: With dead ends: 47 [2022-11-25 22:14:11,780 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 22:14:11,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=291, Invalid=3015, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:14:11,782 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:11,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 116 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 22:14:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-11-25 22:14:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-25 22:14:11,796 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2022-11-25 22:14:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:11,796 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-25 22:14:11,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-25 22:14:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:14:11,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:11,797 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 22:14:11,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:12,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1459244703, now seen corresponding path program 6 times [2022-11-25 22:14:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653734709] [2022-11-25 22:14:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:12,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653734709] [2022-11-25 22:14:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653734709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:12,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756781176] [2022-11-25 22:14:12,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:14:12,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:12,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:12,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:12,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdf9d8d-3c03-4191-9fbc-b551947961ee/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:14:13,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:14:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 22:14:13,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:13,135 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 [2022-11-25 22:14:13,181 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-25 22:14:13,229 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-25 22:14:13,283 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-25 22:14:13,336 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-25 22:14:22,742 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2022-11-25 22:14:22,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-11-25 22:14:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:22,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:39,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2022-11-25 22:14:40,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:14:40,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3274063 treesize of output 3245295 [2022-11-25 22:14:48,122 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 2369 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:18:00,903 WARN L233 SmtUtils]: Spent 2.65m on a formula simplification. DAG size of input: 2118 DAG size of output: 2117 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:18:50,769 WARN L233 SmtUtils]: Spent 42.20s on a formula simplification. DAG size of input: 2116 DAG size of output: 2116 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:21:07,650 WARN L233 SmtUtils]: Spent 2.06m on a formula simplification. DAG size of input: 1737 DAG size of output: 1736 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:23:33,791 WARN L233 SmtUtils]: Spent 2.32m on a formula simplification. DAG size of input: 1735 DAG size of output: 1732 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:23:53,545 WARN L233 SmtUtils]: Spent 19.74s on a formula simplification. DAG size of input: 1733 DAG size of output: 1733 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:24:12,808 WARN L233 SmtUtils]: Spent 18.00s on a formula simplification. DAG size of input: 861 DAG size of output: 860 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:24:26,051 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 812 DAG size of output: 812 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:24:46,065 WARN L233 SmtUtils]: Spent 18.81s on a formula simplification. DAG size of input: 810 DAG size of output: 807 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:00,215 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 799 DAG size of output: 798 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:09,735 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 794 DAG size of output: 793 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:18,948 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 745 DAG size of output: 744 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:25,503 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 736 DAG size of output: 733 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:31,253 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 734 DAG size of output: 734 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:39,051 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 700 DAG size of output: 699 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:48,697 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 649 DAG size of output: 649 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:25:54,709 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 647 DAG size of output: 647 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:26:45,296 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 647 DAG size of output: 647 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:26:54,410 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 647 DAG size of output: 647 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:27:00,688 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 647 DAG size of output: 646 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)