./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:01:16,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:01:16,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:01:16,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:01:16,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:01:16,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:01:16,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:01:16,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:01:16,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:01:16,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:01:16,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:01:16,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:01:16,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:01:16,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:01:16,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:01:16,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:01:16,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:01:16,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:01:16,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:01:16,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:01:16,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:01:16,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:01:16,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:01:16,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:01:16,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:01:16,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:01:16,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:01:16,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:01:16,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:01:16,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:01:16,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:01:16,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:01:16,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:01:16,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:01:16,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:01:16,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:01:16,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:01:16,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:01:16,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:01:16,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:01:16,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:01:16,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:01:16,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:01:16,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:01:16,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:01:16,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:01:16,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:01:16,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:01:16,393 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:01:16,393 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:01:16,394 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:01:16,394 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:01:16,394 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:01:16,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:01:16,395 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:01:16,395 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:01:16,395 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:01:16,395 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:01:16,395 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:01:16,396 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:01:16,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:01:16,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:01:16,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:01:16,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:01:16,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:01:16,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:01:16,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:01:16,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:01:16,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:01:16,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:01:16,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:01:16,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:01:16,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:01:16,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:01:16,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:16,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:01:16,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:01:16,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:01:16,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:01:16,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:01:16,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:01:16,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:01:16,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:01:16,409 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-11-21 00:01:16,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:01:16,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:01:16,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:01:16,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:01:16,720 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:01:16,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-21 00:01:16,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/data/223de862b/0c90acd52d2448c8ba2dc1ecd65c8825/FLAG13383f514 [2021-11-21 00:01:17,296 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:01:17,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-21 00:01:17,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/data/223de862b/0c90acd52d2448c8ba2dc1ecd65c8825/FLAG13383f514 [2021-11-21 00:01:17,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/data/223de862b/0c90acd52d2448c8ba2dc1ecd65c8825 [2021-11-21 00:01:17,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:01:17,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:01:17,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:17,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:01:17,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:01:17,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:17,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e781136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17, skipping insertion in model container [2021-11-21 00:01:17,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:17,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:01:17,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:01:17,902 WARN L230 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_3dbacf52-65dd-4679-a087-08cb200a754b/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-21 00:01:17,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:17,929 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:01:17,941 WARN L230 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_3dbacf52-65dd-4679-a087-08cb200a754b/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-21 00:01:17,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:17,968 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:01:17,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17 WrapperNode [2021-11-21 00:01:17,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:17,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:17,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:01:17,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:01:17,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,036 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-11-21 00:01:18,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:18,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:01:18,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:01:18,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:01:18,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:01:18,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:01:18,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:01:18,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:01:18,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (1/1) ... [2021-11-21 00:01:18,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:18,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:01:18,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:01:18,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:01:18,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:01:18,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:01:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:01:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:01:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:01:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:01:18,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:01:18,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:01:18,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:01:18,228 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:01:18,229 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:01:18,430 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:01:18,477 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:01:18,477 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:01:18,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:18 BoogieIcfgContainer [2021-11-21 00:01:18,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:01:18,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:01:18,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:01:18,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:01:18,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:01:17" (1/3) ... [2021-11-21 00:01:18,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6453561e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:18, skipping insertion in model container [2021-11-21 00:01:18,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:17" (2/3) ... [2021-11-21 00:01:18,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6453561e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:18, skipping insertion in model container [2021-11-21 00:01:18,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:18" (3/3) ... [2021-11-21 00:01:18,490 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-11-21 00:01:18,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:01:18,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:01:18,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:01:18,607 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:01:18,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:01:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:01:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:01:18,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:18,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:18,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2021-11-21 00:01:18,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8282158] [2021-11-21 00:01:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:18,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:18,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8282158] [2021-11-21 00:01:18,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8282158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:18,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:18,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:01:18,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571566888] [2021-11-21 00:01:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:18,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:01:18,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:18,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:01:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:01:18,893 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:01:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:18,947 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-21 00:01:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:01:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-21 00:01:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:18,957 INFO L225 Difference]: With dead ends: 29 [2021-11-21 00:01:18,957 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:01:18,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:01:18,978 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:18,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:01:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:01:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-21 00:01:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:01:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-21 00:01:19,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2021-11-21 00:01:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:19,042 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-21 00:01:19,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:01:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-21 00:01:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:01:19,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:19,045 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:01:19,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2021-11-21 00:01:19,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:19,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872510986] [2021-11-21 00:01:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:19,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:19,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817167558] [2021-11-21 00:01:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:19,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:19,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:01:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:19,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:01:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:01:19,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:01:19,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872510986] [2021-11-21 00:01:19,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817167558] [2021-11-21 00:01:19,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817167558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:19,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:19,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:01:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675219591] [2021-11-21 00:01:19,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:19,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:01:19,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:01:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:01:19,438 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:19,483 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-21 00:01:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:01:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2021-11-21 00:01:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:19,485 INFO L225 Difference]: With dead ends: 24 [2021-11-21 00:01:19,485 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 00:01:19,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:19,487 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:01:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 00:01:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-21 00:01:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:01:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-21 00:01:19,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2021-11-21 00:01:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:19,499 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-21 00:01:19,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-21 00:01:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:01:19,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:19,501 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:19,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:19,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 00:01:19,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2021-11-21 00:01:19,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:19,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924238361] [2021-11-21 00:01:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:19,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:19,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:19,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410552648] [2021-11-21 00:01:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:19,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:19,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:19,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:01:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:01:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:01:20,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:01:20,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:20,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924238361] [2021-11-21 00:01:20,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410552648] [2021-11-21 00:01:20,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410552648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:20,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:20,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:01:20,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493174486] [2021-11-21 00:01:20,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:20,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:20,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:20,008 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:20,105 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-21 00:01:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:01:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-21 00:01:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:20,107 INFO L225 Difference]: With dead ends: 39 [2021-11-21 00:01:20,107 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 00:01:20,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:20,109 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:20,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 00:01:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 00:01:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:01:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-21 00:01:20,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2021-11-21 00:01:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:20,117 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-21 00:01:20,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-21 00:01:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:01:20,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:20,119 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:20,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:20,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:20,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2021-11-21 00:01:20,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:20,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031107757] [2021-11-21 00:01:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:20,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:20,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:20,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133504470] [2021-11-21 00:01:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:20,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:20,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:20,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:01:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 00:01:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:20,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2021-11-21 00:01:20,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:01:22,039 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-21 00:01:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 41 [2021-11-21 00:01:22,280 INFO L354 Elim1Store]: treesize reduction 76, result has 8.4 percent of original size [2021-11-21 00:01:22,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 36 [2021-11-21 00:01:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:01:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:30,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031107757] [2021-11-21 00:01:30,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133504470] [2021-11-21 00:01:30,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133504470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:30,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60513078] [2021-11-21 00:01:30,431 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:01:30,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:30,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:30,441 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:30,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:30,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,883 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:01:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:01:30,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:30,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:01:31,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:01:31,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-11-21 00:01:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:01:31,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:31,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:31,571 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:01:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:01:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:32,110 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:01:32,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:01:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:34,847 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:01:34,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:01:36,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:01:36,650 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:01:38,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:01:38,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:01:38,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-21 00:01:38,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799122480] [2021-11-21 00:01:38,472 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:38,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:01:38,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:01:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1223, Unknown=5, NotChecked=0, Total=1406 [2021-11-21 00:01:38,476 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 00:01:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:38,589 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-11-21 00:01:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:01:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-11-21 00:01:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:38,593 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:01:38,593 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 00:01:38,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=182, Invalid=1295, Unknown=5, NotChecked=0, Total=1482 [2021-11-21 00:01:38,595 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:38,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2021-11-21 00:01:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 00:01:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-11-21 00:01:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 00:01:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-11-21 00:01:38,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 29 [2021-11-21 00:01:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-11-21 00:01:38,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 00:01:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-11-21 00:01:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:01:38,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:38,610 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:38,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:38,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:38,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2021-11-21 00:01:38,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181311930] [2021-11-21 00:01:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:38,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:38,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:38,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305916977] [2021-11-21 00:01:38,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:38,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:38,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:01:38,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:01:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:01:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:01:39,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:01:39,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:39,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181311930] [2021-11-21 00:01:39,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305916977] [2021-11-21 00:01:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305916977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765369229] [2021-11-21 00:01:39,094 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:01:39,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:39,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:39,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:39,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:39,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:39,473 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 00:01:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 00:01:39,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:01:39,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:01:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,014 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 00:01:40,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 213 [2021-11-21 00:01:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,251 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:01:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:01:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:01:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:40,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:40,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:40,618 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:01:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:01:41,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:41,027 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:01:41,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:01:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:43,280 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:01:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:01:44,735 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:01:44,749 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:01:45,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:01:45,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:01:45,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:01:45,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382172502] [2021-11-21 00:01:45,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:45,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:01:45,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:01:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:01:45,879 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:01:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:46,019 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-11-21 00:01:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:01:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2021-11-21 00:01:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:46,021 INFO L225 Difference]: With dead ends: 70 [2021-11-21 00:01:46,021 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 00:01:46,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:01:46,023 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:46,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 00:01:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-11-21 00:01:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 00:01:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-21 00:01:46,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2021-11-21 00:01:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-21 00:01:46,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:01:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-21 00:01:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:01:46,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:46,038 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:46,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:46,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:46,256 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2021-11-21 00:01:46,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827900504] [2021-11-21 00:01:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:46,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:46,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663155244] [2021-11-21 00:01:46,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:01:46,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:46,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:46,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:01:46,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:01:46,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:01:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:01:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:01:46,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:01:46,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827900504] [2021-11-21 00:01:46,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663155244] [2021-11-21 00:01:46,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663155244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:01:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1184936839] [2021-11-21 00:01:46,522 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:01:46,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:46,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:46,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:46,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:46,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:46,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:46,874 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 00:01:46,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 00:01:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:46,985 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 00:01:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 76 [2021-11-21 00:01:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,183 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:01:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:01:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 00:01:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:47,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:47,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:47,572 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 00:01:47,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 00:01:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:48,460 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:01:48,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:01:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:50,564 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:01:50,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:01:51,990 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:01:52,004 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:01:53,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:01:53,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:01:53,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:01:53,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836100166] [2021-11-21 00:01:53,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:01:53,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:01:53,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:01:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:01:53,365 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:01:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:53,488 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-11-21 00:01:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:01:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2021-11-21 00:01:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:53,491 INFO L225 Difference]: With dead ends: 73 [2021-11-21 00:01:53,491 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 00:01:53,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:01:53,493 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:53,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 00:01:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-11-21 00:01:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 00:01:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-11-21 00:01:53,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2021-11-21 00:01:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:53,506 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-11-21 00:01:53,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:01:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-11-21 00:01:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:01:53,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:53,508 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:53,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:01:53,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:53,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2021-11-21 00:01:53,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519205428] [2021-11-21 00:01:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:53,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:53,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:01:53,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541553516] [2021-11-21 00:01:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:01:53,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:53,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:53,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:01:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:01:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:53,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2021-11-21 00:01:53,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:01:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:53,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 00:01:56,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:56,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:56,263 INFO L354 Elim1Store]: treesize reduction 84, result has 40.4 percent of original size [2021-11-21 00:01:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 103 [2021-11-21 00:01:56,638 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-21 00:01:56,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2021-11-21 00:01:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:01:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:01:57,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519205428] [2021-11-21 00:01:57,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:01:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541553516] [2021-11-21 00:01:57,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541553516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85301717] [2021-11-21 00:01:57,712 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:01:57,712 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:01:57,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:01:57,712 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:01:57,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:01:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:57,951 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:01:57,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:01:58,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:01:58,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:01:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-21 00:01:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 00:01:58,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:01:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:58,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:58,411 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 00:01:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 00:01:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:01:59,057 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:01:59,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:01,052 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:02,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:02,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:05,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:05,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:02:05,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-21 00:02:05,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132051759] [2021-11-21 00:02:05,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:02:05,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:02:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1841, Unknown=2, NotChecked=0, Total=2070 [2021-11-21 00:02:05,652 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:02:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:06,052 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-21 00:02:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:02:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2021-11-21 00:02:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:06,054 INFO L225 Difference]: With dead ends: 86 [2021-11-21 00:02:06,054 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 00:02:06,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=233, Invalid=1927, Unknown=2, NotChecked=0, Total=2162 [2021-11-21 00:02:06,055 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:06,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 140 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 255 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-11-21 00:02:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 00:02:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-11-21 00:02:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-21 00:02:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-11-21 00:02:06,072 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 31 [2021-11-21 00:02:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:06,072 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-11-21 00:02:06,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:02:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-11-21 00:02:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:02:06,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:06,074 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:06,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:06,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:02:06,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2021-11-21 00:02:06,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147502993] [2021-11-21 00:02:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:06,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:06,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204243633] [2021-11-21 00:02:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:02:06,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:06,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:06,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:02:06,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:02:06,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:02:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:02:06,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:02:06,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147502993] [2021-11-21 00:02:06,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:02:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204243633] [2021-11-21 00:02:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204243633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931793482] [2021-11-21 00:02:06,591 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:02:06,591 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:06,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:06,592 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:06,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,841 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:02:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:02:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:02:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:06,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-21 00:02:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:02:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:07,316 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:02:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:02:07,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:07,729 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:02:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:09,702 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:09,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:11,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:11,203 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:12,545 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:12,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:02:12,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:02:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347856501] [2021-11-21 00:02:12,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:12,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:02:12,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:02:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:02:12,548 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:12,823 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-11-21 00:02:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:02:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2021-11-21 00:02:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:12,825 INFO L225 Difference]: With dead ends: 128 [2021-11-21 00:02:12,826 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 00:02:12,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:02:12,827 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 41 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:12,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 181 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:02:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 00:02:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2021-11-21 00:02:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:02:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-21 00:02:12,845 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 32 [2021-11-21 00:02:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:12,846 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-21 00:02:12,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-21 00:02:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:02:12,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:12,848 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:12,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:13,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:02:13,052 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2021-11-21 00:02:13,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679570329] [2021-11-21 00:02:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:13,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:13,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:13,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333517861] [2021-11-21 00:02:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:02:13,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:13,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:13,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:13,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:02:13,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:02:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:02:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:02:13,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:02:13,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679570329] [2021-11-21 00:02:13,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:02:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333517861] [2021-11-21 00:02:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333517861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598527678] [2021-11-21 00:02:13,330 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:02:13,330 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:13,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:13,330 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:13,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,586 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:02:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:02:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:02:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-21 00:02:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:13,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 00:02:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:14,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:14,104 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 00:02:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 00:02:14,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:14,889 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:02:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:16,959 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:18,460 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:18,473 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:19,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:19,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:02:19,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:02:19,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375990340] [2021-11-21 00:02:19,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:19,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:02:19,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:02:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:02:19,858 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:20,157 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2021-11-21 00:02:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:02:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2021-11-21 00:02:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:20,160 INFO L225 Difference]: With dead ends: 155 [2021-11-21 00:02:20,160 INFO L226 Difference]: Without dead ends: 147 [2021-11-21 00:02:20,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:02:20,162 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:20,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 136 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:02:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-21 00:02:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2021-11-21 00:02:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:02:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-21 00:02:20,199 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-11-21 00:02:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:20,201 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-21 00:02:20,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-21 00:02:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:02:20,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:20,205 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:20,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:20,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:20,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2021-11-21 00:02:20,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:20,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884527452] [2021-11-21 00:02:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:20,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:20,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:20,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977319912] [2021-11-21 00:02:20,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:02:20,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:20,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:20,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:20,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:02:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-21 00:02:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:20,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2021-11-21 00:02:20,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:02:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:02:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:20,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-21 00:02:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:24,452 INFO L354 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-11-21 00:02:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 139 [2021-11-21 00:02:25,202 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 00:02:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2021-11-21 00:02:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:02:25,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:27,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884527452] [2021-11-21 00:02:27,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:02:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977319912] [2021-11-21 00:02:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977319912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:02:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697269354] [2021-11-21 00:02:27,104 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:02:27,104 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:27,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:27,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:27,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,415 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 00:02:27,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 00:02:27,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,498 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 00:02:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 76 [2021-11-21 00:02:27,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,652 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:02:27,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:02:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:02:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:27,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:27,965 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:02:27,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:02:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:28,314 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:02:28,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:30,309 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:31,802 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:31,816 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:35,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:35,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:02:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-21 00:02:35,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775804821] [2021-11-21 00:02:35,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:35,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:02:35,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:02:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2371, Unknown=3, NotChecked=0, Total=2652 [2021-11-21 00:02:35,174 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:02:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:36,383 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2021-11-21 00:02:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:02:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2021-11-21 00:02:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:36,386 INFO L225 Difference]: With dead ends: 118 [2021-11-21 00:02:36,386 INFO L226 Difference]: Without dead ends: 115 [2021-11-21 00:02:36,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=328, Invalid=2975, Unknown=3, NotChecked=0, Total=3306 [2021-11-21 00:02:36,389 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:36,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 569 Invalid, 0 Unknown, 136 Unchecked, 0.7s Time] [2021-11-21 00:02:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-21 00:02:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-11-21 00:02:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-21 00:02:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-11-21 00:02:36,410 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 33 [2021-11-21 00:02:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-11-21 00:02:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:02:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-11-21 00:02:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:02:36,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:36,412 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:36,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:36,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:02:36,628 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2021-11-21 00:02:36,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:36,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624479406] [2021-11-21 00:02:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:36,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:36,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:36,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343497607] [2021-11-21 00:02:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:02:36,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:36,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:36,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:02:36,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:02:36,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:02:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:02:36,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:02:36,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624479406] [2021-11-21 00:02:36,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:02:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343497607] [2021-11-21 00:02:36,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343497607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012937906] [2021-11-21 00:02:36,968 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:02:36,968 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:36,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:36,969 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:36,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,212 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:02:37,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:02:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:02:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 00:02:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:02:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:37,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:37,642 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:02:37,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:02:38,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:38,049 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:02:38,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:40,315 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:41,946 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:41,961 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:43,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:43,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:02:43,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-21 00:02:43,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937355651] [2021-11-21 00:02:43,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:43,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:02:43,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:02:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:02:43,518 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:43,862 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2021-11-21 00:02:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:02:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2021-11-21 00:02:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:43,865 INFO L225 Difference]: With dead ends: 177 [2021-11-21 00:02:43,865 INFO L226 Difference]: Without dead ends: 174 [2021-11-21 00:02:43,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 00:02:43,867 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 82 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:43,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 196 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:02:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-21 00:02:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 116. [2021-11-21 00:02:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-21 00:02:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2021-11-21 00:02:43,891 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 34 [2021-11-21 00:02:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:43,892 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2021-11-21 00:02:43,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2021-11-21 00:02:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:02:43,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:43,893 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:43,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:44,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:02:44,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2021-11-21 00:02:44,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858668659] [2021-11-21 00:02:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:44,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:44,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:44,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323201750] [2021-11-21 00:02:44,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:02:44,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:44,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:44,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:02:44,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:02:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:02:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:02:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:02:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:02:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:02:44,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858668659] [2021-11-21 00:02:44,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:02:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323201750] [2021-11-21 00:02:44,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323201750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:02:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165670274] [2021-11-21 00:02:44,478 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:02:44,478 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:02:44,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:02:44,478 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:02:44,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:02:44,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,726 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:02:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:02:44,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:02:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-21 00:02:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:44,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:02:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:45,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:45,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:45,180 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:02:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:02:45,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:02:45,504 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:02:45,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:47,860 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:02:47,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:02:49,631 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:02:49,644 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:02:51,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:02:51,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:02:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-21 00:02:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835116660] [2021-11-21 00:02:51,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:02:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:02:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:02:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:02:51,155 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:51,598 INFO L93 Difference]: Finished difference Result 250 states and 328 transitions. [2021-11-21 00:02:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:02:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2021-11-21 00:02:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:51,600 INFO L225 Difference]: With dead ends: 250 [2021-11-21 00:02:51,600 INFO L226 Difference]: Without dead ends: 241 [2021-11-21 00:02:51,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:02:51,602 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 204 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:51,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 212 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:02:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-21 00:02:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 117. [2021-11-21 00:02:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-21 00:02:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-11-21 00:02:51,629 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 34 [2021-11-21 00:02:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-11-21 00:02:51,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:02:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-11-21 00:02:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:02:51,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:51,631 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:51,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:02:51,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:51,840 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2021-11-21 00:02:51,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518331614] [2021-11-21 00:02:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:51,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:51,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:02:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244827284] [2021-11-21 00:02:51,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:02:51,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:02:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:02:51,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:02:51,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:02:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-21 00:02:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:02:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2021-11-21 00:02:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:02:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 00:02:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2021-11-21 00:02:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:52,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-21 00:02:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:02:57,749 INFO L354 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-11-21 00:02:57,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 120 treesize of output 175 [2021-11-21 00:02:59,129 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-21 00:02:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2021-11-21 00:02:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:02:59,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:06,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518331614] [2021-11-21 00:03:06,735 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:03:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244827284] [2021-11-21 00:03:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244827284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948609005] [2021-11-21 00:03:06,736 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:03:06,737 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:06,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:06,738 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:06,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:06,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:07,085 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 00:03:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 00:03:07,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:03:07,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:03:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,026 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 00:03:08,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 287 treesize of output 295 [2021-11-21 00:03:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,410 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:03:08,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:03:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:03:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:08,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:08,872 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:03:08,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:03:09,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:09,373 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:03:09,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:03:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:12,034 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:03:12,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:03:14,192 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:03:14,206 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:03:19,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:03:19,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:03:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-21 00:03:19,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235808216] [2021-11-21 00:03:19,169 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:03:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:03:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2988, Unknown=5, NotChecked=0, Total=3306 [2021-11-21 00:03:19,172 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:03:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:20,194 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2021-11-21 00:03:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:03:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2021-11-21 00:03:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:20,196 INFO L225 Difference]: With dead ends: 152 [2021-11-21 00:03:20,197 INFO L226 Difference]: Without dead ends: 149 [2021-11-21 00:03:20,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=319, Invalid=3098, Unknown=5, NotChecked=0, Total=3422 [2021-11-21 00:03:20,199 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:20,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 214 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 525 Invalid, 0 Unknown, 123 Unchecked, 0.8s Time] [2021-11-21 00:03:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-21 00:03:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-11-21 00:03:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 00:03:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2021-11-21 00:03:20,228 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 35 [2021-11-21 00:03:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2021-11-21 00:03:20,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:03:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2021-11-21 00:03:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:03:20,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:20,230 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:20,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:20,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:20,436 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2021-11-21 00:03:20,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:20,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419999863] [2021-11-21 00:03:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:20,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:20,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:03:20,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259844479] [2021-11-21 00:03:20,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:03:20,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:20,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:20,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:20,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:03:20,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 00:03:20,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:03:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:03:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:03:20,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:03:20,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419999863] [2021-11-21 00:03:20,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:03:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259844479] [2021-11-21 00:03:20,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259844479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372042771] [2021-11-21 00:03:20,876 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:03:20,876 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:20,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:20,877 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:20,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,222 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:03:21,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:03:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:03:21,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:03:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-21 00:03:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 00:03:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:21,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:21,827 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 00:03:21,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 00:03:22,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:22,464 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:03:22,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:03:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:25,176 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:03:25,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:03:27,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:03:27,275 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:03:29,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:03:29,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:03:29,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-21 00:03:29,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842779528] [2021-11-21 00:03:29,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:03:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:03:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:03:29,135 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:03:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:29,658 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2021-11-21 00:03:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:03:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2021-11-21 00:03:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:29,660 INFO L225 Difference]: With dead ends: 225 [2021-11-21 00:03:29,661 INFO L226 Difference]: Without dead ends: 222 [2021-11-21 00:03:29,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 00:03:29,663 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 102 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 250 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:03:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-21 00:03:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 146. [2021-11-21 00:03:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 90 states have internal predecessors, (101), 38 states have call successors, (38), 18 states have call predecessors, (38), 18 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-21 00:03:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-11-21 00:03:29,698 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 36 [2021-11-21 00:03:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:29,699 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-11-21 00:03:29,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:03:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-11-21 00:03:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:03:29,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:29,701 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:29,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:29,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:03:29,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2021-11-21 00:03:29,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242002117] [2021-11-21 00:03:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:29,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:29,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:03:29,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367680786] [2021-11-21 00:03:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:03:29,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:29,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:29,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:03:30,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:03:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:03:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:03:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:03:30,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:03:30,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242002117] [2021-11-21 00:03:30,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:03:30,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367680786] [2021-11-21 00:03:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367680786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:30,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134950657] [2021-11-21 00:03:30,347 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:03:30,347 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:30,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:30,347 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:30,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,636 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:03:30,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:03:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 00:03:30,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-21 00:03:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 00:03:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:31,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:31,147 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 00:03:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 00:03:31,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:03:31,645 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:03:31,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:03:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:34,437 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-21 00:03:34,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-21 00:03:36,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2021-11-21 00:03:36,616 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:03:38,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:03:38,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:03:38,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-21 00:03:38,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673409377] [2021-11-21 00:03:38,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:03:38,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:03:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:03:38,754 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:03:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:39,723 INFO L93 Difference]: Finished difference Result 375 states and 497 transitions. [2021-11-21 00:03:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:03:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2021-11-21 00:03:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:39,731 INFO L225 Difference]: With dead ends: 375 [2021-11-21 00:03:39,732 INFO L226 Difference]: Without dead ends: 365 [2021-11-21 00:03:39,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 00:03:39,740 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 255 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:39,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 288 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:03:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-21 00:03:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 147. [2021-11-21 00:03:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 states have internal predecessors, (101), 38 states have call successors, (38), 18 states have call predecessors, (38), 18 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-21 00:03:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-11-21 00:03:39,775 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 36 [2021-11-21 00:03:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-11-21 00:03:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:03:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-11-21 00:03:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:03:39,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:39,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:39,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:39,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:39,977 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2021-11-21 00:03:39,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787579599] [2021-11-21 00:03:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:39,998 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:03:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725872010] [2021-11-21 00:03:39,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:03:39,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:40,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:40,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbacf52-65dd-4679-a087-08cb200a754b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:03:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:40,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-21 00:03:40,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:40,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2021-11-21 00:03:40,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 00:03:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-21 00:03:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-21 00:03:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2021-11-21 00:03:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:40,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2021-11-21 00:03:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:03:49,765 INFO L354 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-11-21 00:03:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 211 [2021-11-21 00:03:52,583 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-11-21 00:03:52,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2021-11-21 00:03:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:03:52,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:37,554 WARN L227 SmtUtils]: Spent 2.09m on a formula simplification. DAG size of input: 749 DAG size of output: 334 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:06:37,556 INFO L354 Elim1Store]: treesize reduction 16920, result has 9.1 percent of original size [2021-11-21 00:06:37,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 47 case distinctions, treesize of input -6796274064336892324 treesize of output 2427097972517878912