./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh --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 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:14:52,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:14:52,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:14:52,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:14:52,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:14:52,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:14:52,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:14:52,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:14:52,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:14:52,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:14:52,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:14:52,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:14:52,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:14:52,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:14:52,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:14:52,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:14:52,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:14:52,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:14:52,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:14:52,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:14:52,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:14:52,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:14:52,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:14:52,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:14:52,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:14:52,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:14:52,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:14:52,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:14:52,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:14:52,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:14:52,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:14:52,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:14:52,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:14:52,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:14:52,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:14:52,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:14:52,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:14:52,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:14:52,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:14:52,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:14:52,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:14:52,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:14:52,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:14:52,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:14:52,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:14:52,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:14:52,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:14:52,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:14:52,487 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:14:52,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:14:52,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:14:52,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:14:52,487 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:14:52,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:14:52,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:14:52,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:14:52,488 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:14:52,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:14:52,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:14:52,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:14:52,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:14:52,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:14:52,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:14:52,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:14:52,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:14:52,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:14:52,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:14:52,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:14:52,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:14:52,491 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:14:52,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:14:52,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:14:52,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:14:52,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 [2022-12-14 08:14:52,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:14:52,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:14:52,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:14:52,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:14:52,705 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:14:52,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/sina5.c [2022-12-14 08:14:55,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:14:55,520 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:14:55,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/sv-benchmarks/c/array-fpi/sina5.c [2022-12-14 08:14:55,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/data/bdeb28e26/7bb215f031e44890b2e34bfd7b2befe5/FLAG6c1df4cd5 [2022-12-14 08:14:55,535 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/data/bdeb28e26/7bb215f031e44890b2e34bfd7b2befe5 [2022-12-14 08:14:55,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:14:55,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:14:55,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:14:55,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:14:55,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:14:55,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333706e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55, skipping insertion in model container [2022-12-14 08:14:55,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:14:55,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:14:55,662 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2022-12-14 08:14:55,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:14:55,684 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:14:55,697 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2022-12-14 08:14:55,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:14:55,719 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:14:55,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55 WrapperNode [2022-12-14 08:14:55,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:14:55,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:14:55,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:14:55,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:14:55,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,749 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 117 [2022-12-14 08:14:55,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:14:55,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:14:55,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:14:55,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:14:55,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:14:55,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:14:55,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:14:55,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:14:55,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (1/1) ... [2022-12-14 08:14:55,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:14:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:55,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:14:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:14:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:14:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:14:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:14:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:14:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:14:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:14:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:14:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:14:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:14:55,899 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:14:55,900 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:14:56,025 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:14:56,070 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:14:56,071 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 08:14:56,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:14:56 BoogieIcfgContainer [2022-12-14 08:14:56,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:14:56,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:14:56,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:14:56,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:14:56,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:14:55" (1/3) ... [2022-12-14 08:14:56,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477c883f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:14:56, skipping insertion in model container [2022-12-14 08:14:56,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:14:55" (2/3) ... [2022-12-14 08:14:56,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477c883f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:14:56, skipping insertion in model container [2022-12-14 08:14:56,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:14:56" (3/3) ... [2022-12-14 08:14:56,079 INFO L112 eAbstractionObserver]: Analyzing ICFG sina5.c [2022-12-14 08:14:56,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:14:56,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:14:56,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:14:56,134 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@bb5be4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:14:56,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:14:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:14:56,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:56,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:56,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1752185494, now seen corresponding path program 1 times [2022-12-14 08:14:56,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:56,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132509785] [2022-12-14 08:14:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:14:56,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132509785] [2022-12-14 08:14:56,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132509785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:56,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:14:56,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:14:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154505462] [2022-12-14 08:14:56,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:56,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:56,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:14:56,425 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:56,478 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-12-14 08:14:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:14:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:56,486 INFO L225 Difference]: With dead ends: 26 [2022-12-14 08:14:56,486 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 08:14:56,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:14:56,491 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:14:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 08:14:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 08:14:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-12-14 08:14:56,514 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2022-12-14 08:14:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:56,514 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-12-14 08:14:56,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-12-14 08:14:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:14:56,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:56,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:56,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:14:56,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash 865565438, now seen corresponding path program 1 times [2022-12-14 08:14:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:56,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946140954] [2022-12-14 08:14:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:56,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:14:56,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946140954] [2022-12-14 08:14:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946140954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:14:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:14:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240722201] [2022-12-14 08:14:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:14:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:14:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:14:56,610 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:56,655 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2022-12-14 08:14:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:14:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:14:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:56,656 INFO L225 Difference]: With dead ends: 30 [2022-12-14 08:14:56,656 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 08:14:56,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:14:56,657 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:56,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:14:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 08:14:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2022-12-14 08:14:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-14 08:14:56,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-12-14 08:14:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:56,662 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-14 08:14:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:14:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-14 08:14:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:14:56,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:56,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:14:56,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash -351940213, now seen corresponding path program 1 times [2022-12-14 08:14:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763229388] [2022-12-14 08:14:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:14:58,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763229388] [2022-12-14 08:14:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763229388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845467879] [2022-12-14 08:14:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:58,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:58,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:58,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:14:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 08:14:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:58,174 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:14:58,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 08:14:58,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:14:58,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 08:14:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:14:58,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-12-14 08:14:58,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 08:14:58,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-12-14 08:14:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:14:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:14:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:14:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845467879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:14:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953718535] [2022-12-14 08:14:59,511 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:14:59,511 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:14:59,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:14:59,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:14:59,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:14:59,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,658 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:14:59,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:14:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,799 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:14:59,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:14:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:14:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:14:59,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:15:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:00,080 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:15:00,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:15:00,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:00,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:00,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:15:00,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:00,401 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:00,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:00,450 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:00,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:00,505 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:00,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:00,557 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:00,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:00,590 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:00,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 08:15:00,636 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:00,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:00,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:01,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '276#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:01,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:01,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-12-14 08:15:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103376959] [2022-12-14 08:15:01,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 08:15:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 08:15:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 08:15:01,469 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:02,470 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-12-14 08:15:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:15:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 08:15:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:02,471 INFO L225 Difference]: With dead ends: 43 [2022-12-14 08:15:02,471 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 08:15:02,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=245, Invalid=2107, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 08:15:02,472 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:02,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 86 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:15:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 08:15:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-12-14 08:15:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-12-14 08:15:02,478 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 15 [2022-12-14 08:15:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:02,478 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-12-14 08:15:02,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-12-14 08:15:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:15:02,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:02,479 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:02,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:02,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash -404843997, now seen corresponding path program 2 times [2022-12-14 08:15:02,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514385185] [2022-12-14 08:15:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:15:02,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:02,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514385185] [2022-12-14 08:15:02,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514385185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:02,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682126355] [2022-12-14 08:15:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:15:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:02,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:15:02,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:15:02,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:15:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:15:02,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:15:02,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682126355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:02,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608238598] [2022-12-14 08:15:02,895 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:15:02,895 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:15:02,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:15:02,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:15:02,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:15:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:02,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:02,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,011 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:15:03,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:15:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:15:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:15:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:15:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:03,277 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:15:03,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:15:03,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:03,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:15:03,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:03,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:03,473 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:03,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:03,517 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:03,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:03,546 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:03,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:03,585 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:03,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:03,630 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:03,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:03,674 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:03,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:03,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:03,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '521#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:03,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:03,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:03,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 08:15:03,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875267509] [2022-12-14 08:15:03,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:03,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:15:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:03,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:15:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:15:03,960 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:04,054 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-12-14 08:15:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:15:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:15:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:04,057 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:15:04,057 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 08:15:04,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:15:04,058 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:04,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 08:15:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2022-12-14 08:15:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-12-14 08:15:04,069 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 16 [2022-12-14 08:15:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:04,069 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-12-14 08:15:04,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-12-14 08:15:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:15:04,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:04,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:04,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:15:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:04,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1065897270, now seen corresponding path program 3 times [2022-12-14 08:15:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:04,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953377755] [2022-12-14 08:15:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:04,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:15:04,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953377755] [2022-12-14 08:15:04,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953377755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433852027] [2022-12-14 08:15:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:15:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:04,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:15:04,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:15:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:15:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:15:04,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:15:04,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433852027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969362142] [2022-12-14 08:15:04,475 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:15:04,476 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:15:04,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:15:04,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:15:04,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:15:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,577 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:15:04,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:15:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:15:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:15:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:15:04,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:04,787 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:15:04,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:15:04,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:04,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:04,931 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:04,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:04,975 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:04,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:05,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:05,022 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:05,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:05,065 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:05,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:05,092 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:05,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:05,134 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:05,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:05,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:05,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '814#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:05,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:05,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 08:15:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251588522] [2022-12-14 08:15:05,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:15:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:15:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:15:05,439 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:05,502 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-12-14 08:15:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:15:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:15:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:05,503 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:15:05,503 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:15:05,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:15:05,504 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:05,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:15:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:15:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-12-14 08:15:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 08:15:05,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-12-14 08:15:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:05,507 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 08:15:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 08:15:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:15:05,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:05,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:05,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:05,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -349840970, now seen corresponding path program 4 times [2022-12-14 08:15:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:05,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690712390] [2022-12-14 08:15:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:07,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:07,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690712390] [2022-12-14 08:15:07,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690712390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:07,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351183441] [2022-12-14 08:15:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:15:07,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:07,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:07,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:07,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:15:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:07,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 08:15:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:07,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:15:07,600 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:15:07,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 08:15:07,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 08:15:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:07,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 08:15:07,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-12-14 08:15:07,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:07,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 08:15:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:07,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-12-14 08:15:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:07,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:07,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-12-14 08:15:08,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2022-12-14 08:15:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 58 [2022-12-14 08:15:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 67 [2022-12-14 08:15:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:08,447 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 08:15:08,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 60 [2022-12-14 08:15:08,636 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:15:08,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 37 [2022-12-14 08:15:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:08,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351183441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218017249] [2022-12-14 08:15:11,725 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:15:11,725 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:15:11,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:15:11,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:15:11,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:15:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,856 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:15:11,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:15:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:11,985 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:15:11,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:15:12,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:15:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:15:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:12,204 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:15:12,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:15:12,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:12,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:12,362 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:12,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:12,418 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:12,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:12,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:12,472 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:12,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:12,519 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:12,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:12,552 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:12,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 08:15:12,603 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:12,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:12,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:13,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1126#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:13,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-12-14 08:15:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577907418] [2022-12-14 08:15:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 08:15:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 08:15:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2720, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 08:15:13,473 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:51,069 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2022-12-14 08:15:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 08:15:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 08:15:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:51,070 INFO L225 Difference]: With dead ends: 67 [2022-12-14 08:15:51,070 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 08:15:51,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=530, Invalid=5632, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 08:15:51,071 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:51,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 207 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-14 08:15:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 08:15:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2022-12-14 08:15:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-12-14 08:15:51,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 20 [2022-12-14 08:15:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:51,082 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-12-14 08:15:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-12-14 08:15:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:15:51,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:51,082 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:51,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:15:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:51,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -618285026, now seen corresponding path program 5 times [2022-12-14 08:15:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:51,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243545050] [2022-12-14 08:15:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:15:51,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243545050] [2022-12-14 08:15:51,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243545050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828458467] [2022-12-14 08:15:51,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:15:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:51,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:51,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:15:51,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:15:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:15:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:15:51,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:15:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828458467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147560934] [2022-12-14 08:15:51,566 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:15:51,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:15:51,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:15:51,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:15:51,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:15:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,685 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:15:51,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:15:51,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:15:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:15:51,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:15:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:51,927 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:15:51,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:15:52,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:52,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:52,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:15:52,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:52,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:52,132 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:52,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:52,188 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:52,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:52,235 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:52,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:52,283 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:52,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:52,314 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:52,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:52,362 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:52,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:52,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1492#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:52,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:52,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:52,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 08:15:52,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951536855] [2022-12-14 08:15:52,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:52,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:15:52,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:15:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:15:52,848 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:53,042 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-12-14 08:15:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:15:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:15:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:53,043 INFO L225 Difference]: With dead ends: 95 [2022-12-14 08:15:53,043 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 08:15:53,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:15:53,045 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:53,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 92 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 08:15:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2022-12-14 08:15:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-12-14 08:15:53,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2022-12-14 08:15:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:53,057 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-12-14 08:15:53,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-12-14 08:15:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:15:53,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:53,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:53,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:15:53,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:15:53,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1865835095, now seen corresponding path program 6 times [2022-12-14 08:15:53,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:53,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407272879] [2022-12-14 08:15:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:15:53,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407272879] [2022-12-14 08:15:53,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407272879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175891529] [2022-12-14 08:15:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:15:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:53,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:53,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:15:53,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:15:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:15:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:15:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:15:53,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175891529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091849859] [2022-12-14 08:15:53,496 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:15:53,496 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:15:53,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:15:53,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:15:53,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:15:53,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,534 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:15:53,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:15:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,654 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:15:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:15:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,794 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:15:53,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:15:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:15:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:53,993 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:15:53,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:15:54,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:54,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:15:54,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:15:54,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:54,143 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:15:54,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:15:54,187 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:54,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:54,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:54,228 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:54,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:15:54,279 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:15:54,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:15:54,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:54,304 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:15:54,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 08:15:54,346 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:15:54,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:15:54,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:15:54,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1888#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:15:54,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:15:54,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:15:54,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 08:15:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683584607] [2022-12-14 08:15:54,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:15:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:15:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:15:54,722 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:54,824 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-12-14 08:15:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:15:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 08:15:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:54,825 INFO L225 Difference]: With dead ends: 85 [2022-12-14 08:15:54,825 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 08:15:54,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:15:54,826 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:54,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 33 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 08:15:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-12-14 08:15:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-14 08:15:54,839 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2022-12-14 08:15:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:54,839 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-14 08:15:54,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-14 08:15:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:15:54,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:54,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:54,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:55,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:15:55,042 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1778535419, now seen corresponding path program 1 times [2022-12-14 08:15:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:55,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038700860] [2022-12-14 08:15:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:57,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038700860] [2022-12-14 08:15:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038700860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927257025] [2022-12-14 08:15:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:57,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:57,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:15:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 08:15:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:57,169 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:15:57,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 08:15:57,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:15:57,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 08:15:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:15:57,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-12-14 08:15:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-12-14 08:15:57,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 58 [2022-12-14 08:15:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:57,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 08:15:57,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-12-14 08:15:57,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 60 [2022-12-14 08:15:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:57,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-12-14 08:15:57,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:15:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:57,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2022-12-14 08:15:58,146 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:15:58,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 38 [2022-12-14 08:15:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:03,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927257025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741155768] [2022-12-14 08:16:03,948 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:16:03,948 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:16:03,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:16:03,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:16:03,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:16:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:03,977 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:16:03,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:16:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,090 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:16:04,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:16:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,213 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:16:04,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:16:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:16:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:04,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:04,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:04,384 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:16:04,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:16:04,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:16:04,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:16:04,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:16:04,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:16:04,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:04,635 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:16:04,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:16:04,688 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:16:04,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:16:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:04,733 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:16:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:16:04,775 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:16:04,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:16:04,801 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:16:04,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:16:04,842 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:16:04,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:16:04,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:16:06,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2300#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:16:06,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:16:06,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:16:06,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 51 [2022-12-14 08:16:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516410049] [2022-12-14 08:16:06,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 08:16:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:16:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 08:16:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 08:16:06,582 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:12,366 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-12-14 08:16:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 08:16:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:16:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:12,367 INFO L225 Difference]: With dead ends: 47 [2022-12-14 08:16:12,367 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 08:16:12,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 16 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=313, Invalid=3977, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:16:12,368 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:12,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 08:16:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 08:16:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-14 08:16:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 08:16:12,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2022-12-14 08:16:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:12,375 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 08:16:12,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 08:16:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:16:12,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:12,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:12,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:12,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:16:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1580525205, now seen corresponding path program 7 times [2022-12-14 08:16:12,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:16:12,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472556378] [2022-12-14 08:16:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:16:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:14,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:16:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472556378] [2022-12-14 08:16:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472556378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:16:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22402925] [2022-12-14 08:16:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:16:14,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:14,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:14,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:16:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:14,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 08:16:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:14,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:16:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:14,936 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:16:14,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 08:16:14,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 08:16:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 08:16:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 08:16:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2022-12-14 08:16:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2022-12-14 08:16:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-12-14 08:16:15,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 81 [2022-12-14 08:16:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 08:16:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:15,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2022-12-14 08:16:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2022-12-14 08:16:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 94 [2022-12-14 08:16:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 82 [2022-12-14 08:16:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-12-14 08:16:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,619 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:16:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 84 [2022-12-14 08:16:16,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:16,735 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 08:16:16,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 63 [2022-12-14 08:16:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,909 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:16:16,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 68 treesize of output 44 [2022-12-14 08:16:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:16,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:30,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22402925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094014467] [2022-12-14 08:16:30,503 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:16:30,503 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:16:30,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:16:30,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:16:30,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:16:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,591 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:16:30,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:16:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,615 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:16:30,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:16:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,713 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:16:30,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:16:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:16:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:30,892 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:16:30,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:16:31,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:16:31,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:16:31,070 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:16:31,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-12-14 08:16:31,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:16:31,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:31,111 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:16:31,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:16:31,157 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:16:31,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:16:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:31,192 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:16:31,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:16:31,234 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:16:31,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:16:31,259 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:16:31,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:16:31,300 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:16:31,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:16:31,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:16:33,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2667#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:16:33,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:16:33,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:16:33,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2022-12-14 08:16:33,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916283100] [2022-12-14 08:16:33,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:33,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 08:16:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:16:33,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 08:16:33,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=4740, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 08:16:33,778 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:57,236 WARN L233 SmtUtils]: Spent 9.94s on a formula simplification. DAG size of input: 206 DAG size of output: 153 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:18:22,914 WARN L233 SmtUtils]: Spent 9.93s on a formula simplification. DAG size of input: 204 DAG size of output: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:18:48,562 WARN L233 SmtUtils]: Spent 11.33s on a formula simplification. DAG size of input: 207 DAG size of output: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:19:24,321 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 196 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:19:43,741 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 199 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:20:28,274 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 197 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:20:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:20:51,670 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-12-14 08:20:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 08:20:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 08:20:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:20:51,671 INFO L225 Difference]: With dead ends: 80 [2022-12-14 08:20:51,671 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 08:20:51,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3284 ImplicationChecksByTransitivity, 236.6s TimeCoverageRelationStatistics Valid=732, Invalid=8970, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 08:20:51,674 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:20:51,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 265 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 38.5s Time] [2022-12-14 08:20:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 08:20:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2022-12-14 08:20:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-12-14 08:20:51,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 25 [2022-12-14 08:20:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:20:51,694 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-12-14 08:20:51,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-12-14 08:20:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 08:20:51,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:20:51,695 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:20:51,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:20:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:20:51,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:20:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:20:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1585314819, now seen corresponding path program 8 times [2022-12-14 08:20:51,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:20:51,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998365805] [2022-12-14 08:20:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:20:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:20:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:20:51,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:20:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998365805] [2022-12-14 08:20:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998365805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:20:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015073360] [2022-12-14 08:20:51,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:20:51,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:20:51,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:20:51,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:20:51,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:20:52,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:20:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:20:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:20:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:20:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:20:52,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:20:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:20:52,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015073360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:20:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834078756] [2022-12-14 08:20:52,242 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:20:52,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:20:52,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:20:52,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:20:52,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:20:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,278 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:20:52,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:20:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,388 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:20:52,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:20:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:20:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:20:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:52,614 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:20:52,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:20:52,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:20:52,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:20:52,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:20:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:52,788 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:20:52,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:20:52,842 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:20:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:20:52,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:52,899 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:20:52,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:20:52,946 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:20:52,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:20:52,979 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:20:52,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:20:53,024 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:20:53,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:20:53,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:20:53,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3108#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:20:53,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:20:53,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:20:53,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-14 08:20:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959218757] [2022-12-14 08:20:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:20:53,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:20:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:20:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:20:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:20:53,417 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:20:53,684 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2022-12-14 08:20:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:20:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 08:20:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:20:53,685 INFO L225 Difference]: With dead ends: 117 [2022-12-14 08:20:53,685 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 08:20:53,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:20:53,685 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:20:53,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 110 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:20:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 08:20:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 50. [2022-12-14 08:20:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-12-14 08:20:53,707 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 26 [2022-12-14 08:20:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:20:53,707 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-12-14 08:20:53,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-12-14 08:20:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 08:20:53,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:20:53,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:20:53,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:20:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:20:53,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:20:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:20:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1425324310, now seen corresponding path program 9 times [2022-12-14 08:20:53,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:20:53,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759752855] [2022-12-14 08:20:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:20:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:20:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:20:54,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:20:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759752855] [2022-12-14 08:20:54,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759752855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:20:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051142507] [2022-12-14 08:20:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:20:54,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:20:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:20:54,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:20:54,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:20:54,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:20:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:20:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:20:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:20:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:20:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:20:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:20:54,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051142507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:20:54,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278925818] [2022-12-14 08:20:54,221 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:20:54,221 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:20:54,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:20:54,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:20:54,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:20:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,246 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:20:54,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:20:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,339 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:20:54,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:20:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:20:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:20:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:54,623 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:20:54,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:20:54,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:20:54,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:20:54,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:20:54,854 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:20:54,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:20:54,914 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:20:54,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:20:54,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:54,975 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:20:54,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:20:55,022 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:20:55,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:20:55,055 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:20:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:20:55,101 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:20:55,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:20:55,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:20:55,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3591#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:20:55,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:20:55,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:20:55,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-14 08:20:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418582112] [2022-12-14 08:20:55,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:20:55,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:20:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:20:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:20:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:20:55,544 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:20:55,731 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-12-14 08:20:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:20:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 08:20:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:20:55,732 INFO L225 Difference]: With dead ends: 106 [2022-12-14 08:20:55,732 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 08:20:55,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:20:55,732 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:20:55,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 45 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:20:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 08:20:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2022-12-14 08:20:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-12-14 08:20:55,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2022-12-14 08:20:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:20:55,775 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-12-14 08:20:55,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:20:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-12-14 08:20:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:20:55,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:20:55,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:20:55,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:20:55,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:20:55,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:20:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:20:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 305329190, now seen corresponding path program 2 times [2022-12-14 08:20:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:20:55,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277280118] [2022-12-14 08:20:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:20:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:20:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:20:57,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:20:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277280118] [2022-12-14 08:20:57,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277280118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:20:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415636526] [2022-12-14 08:20:57,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:20:57,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:20:57,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:20:57,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:20:57,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:20:57,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:20:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:20:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 08:20:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:20:58,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 08:20:58,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:20:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 08:20:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 08:20:58,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 08:20:58,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,373 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 08:20:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 08:20:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-12-14 08:20:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,522 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 08:20:58,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 55 [2022-12-14 08:20:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:58,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 42 [2022-12-14 08:20:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:20:58,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:04,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:04,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 162 [2022-12-14 08:21:04,380 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~i~0#1_477| Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_886 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_477|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_886)) (.cse1 (+ (* c_~N~0 2) 1))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_477| 1) c_~N~0) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1)) (= (select .cse0 .cse2) .cse1))))) (not (< 1 c_~N~0))) is different from false [2022-12-14 08:21:04,498 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 1 c_~N~0)) (forall ((|v_ULTIMATE.start_main_~i~0#1_477| Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_886 Int)) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_874) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse3 .cse1 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 .cse1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_477|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_886)) (.cse2 (+ (* c_~N~0 2) 1))) (or (= (select .cse0 .cse1) .cse2) (< (+ |v_ULTIMATE.start_main_~i~0#1_477| 1) c_~N~0) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2))))))) is different from false [2022-12-14 08:21:04,594 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_477| Int) (v_ArrVal_870 Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_886 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (+ (* 2 ~N~0) 1)) (.cse1 (store (let ((.cse4 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_870)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_874) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 .cse2)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_477|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_886))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_477| 1) ~N~0) (= .cse0 (select .cse1 .cse2)) (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (not (< 1 ~N~0)) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-12-14 08:21:04,625 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_477| Int) (v_ArrVal_870 Int) (v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_492| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_886 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_492|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_870)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_874) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_477|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_886)) (.cse0 (+ (* 2 ~N~0) 1))) (or (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_477| 1) ~N~0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_492|)) (not (< |v_ULTIMATE.start_main_~i~0#1_492| ~N~0)) (not (< 1 ~N~0)) (= (select .cse1 .cse2) .cse0))))) is different from false [2022-12-14 08:21:04,675 INFO L321 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-12-14 08:21:04,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 524 treesize of output 237 [2022-12-14 08:21:04,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1797 treesize of output 1729 [2022-12-14 08:21:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:04,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:04,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1660 treesize of output 1634 [2022-12-14 08:21:04,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:04,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:04,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1424 treesize of output 1278 [2022-12-14 08:21:04,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:04,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:04,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 807 treesize of output 839 [2022-12-14 08:21:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 13 not checked. [2022-12-14 08:21:15,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415636526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:15,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358929160] [2022-12-14 08:21:15,535 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:21:15,535 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:15,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:15,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:15,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,656 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:21:15,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:21:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 08:21:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 08:21:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:21:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:15,896 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:21:15,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:21:16,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:16,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:16,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:21:16,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:16,158 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:21:16,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:21:16,209 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:21:16,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:21:16,237 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:21:16,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:21:16,285 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:21:16,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:21:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:16,327 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:21:16,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:21:16,370 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:21:16,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:21:16,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:17,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4090#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:17,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:17,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:17,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 18] total 50 [2022-12-14 08:21:17,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255337961] [2022-12-14 08:21:17,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:17,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 08:21:17,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 08:21:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2277, Unknown=5, NotChecked=404, Total=2970 [2022-12-14 08:21:17,494 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:47,562 WARN L233 SmtUtils]: Spent 16.27s on a formula simplification. DAG size of input: 106 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:21:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:50,581 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-12-14 08:21:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 08:21:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 08:21:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:50,582 INFO L225 Difference]: With dead ends: 86 [2022-12-14 08:21:50,582 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 08:21:50,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 21 SemanticMatches, 90 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=860, Invalid=6807, Unknown=5, NotChecked=700, Total=8372 [2022-12-14 08:21:50,586 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:50,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 65 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 680 Invalid, 0 Unknown, 208 Unchecked, 1.0s Time] [2022-12-14 08:21:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 08:21:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2022-12-14 08:21:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-12-14 08:21:50,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 28 [2022-12-14 08:21:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:50,630 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-12-14 08:21:50,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-12-14 08:21:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 08:21:50,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:50,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:50,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:21:50,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:50,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -669577002, now seen corresponding path program 10 times [2022-12-14 08:21:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:50,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569053098] [2022-12-14 08:21:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:54,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569053098] [2022-12-14 08:21:54,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569053098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720550417] [2022-12-14 08:21:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:21:54,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:54,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:54,331 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:54,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:21:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:54,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-14 08:21:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:54,421 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:21:54,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 08:21:54,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:54,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 08:21:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:21:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-12-14 08:21:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2022-12-14 08:21:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2022-12-14 08:21:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:54,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 08:21:55,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 102 [2022-12-14 08:21:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2022-12-14 08:21:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 108 [2022-12-14 08:21:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 113 [2022-12-14 08:21:55,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:55,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 117 [2022-12-14 08:21:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:55,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 112 [2022-12-14 08:21:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 112 [2022-12-14 08:21:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 112 [2022-12-14 08:21:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2022-12-14 08:21:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:56,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-12-14 08:21:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 118 [2022-12-14 08:21:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,456 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:21:57,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 111 treesize of output 109 [2022-12-14 08:21:57,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,641 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:21:57,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 113 treesize of output 97 [2022-12-14 08:21:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:57,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:57,771 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 08:21:57,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 75 [2022-12-14 08:21:58,057 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:21:58,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 47 [2022-12-14 08:21:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:58,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:22:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:22:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720550417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:22:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540472331] [2022-12-14 08:22:47,730 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:22:47,730 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:22:47,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:22:47,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:22:47,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:22:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,764 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:22:47,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:22:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,883 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:22:47,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:22:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:47,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,011 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:22:48,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:22:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 08:22:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:48,207 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 08:22:48,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 08:22:48,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:22:48,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:22:48,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:22:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:48,358 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 08:22:48,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 08:22:48,406 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:22:48,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:22:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:48,449 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:22:48,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:22:48,498 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:22:48,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:22:48,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:48,529 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:22:48,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 08:22:48,577 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:22:48,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:22:48,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:22:50,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4687#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:22:50,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:22:50,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:22:50,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 78 [2022-12-14 08:22:50,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403256841] [2022-12-14 08:22:50,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:22:50,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-14 08:22:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:22:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-14 08:22:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6390, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 08:22:50,790 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:23:50,913 WARN L233 SmtUtils]: Spent 20.17s on a formula simplification. DAG size of input: 356 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:24:41,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:24:45,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 08:26:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:26:53,476 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2022-12-14 08:26:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-14 08:26:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 08:26:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:26:53,477 INFO L225 Difference]: With dead ends: 195 [2022-12-14 08:26:53,477 INFO L226 Difference]: Without dead ends: 172 [2022-12-14 08:26:53,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5360 ImplicationChecksByTransitivity, 243.6s TimeCoverageRelationStatistics Valid=1164, Invalid=16128, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 08:26:53,479 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:53,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 266 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 52.8s Time] [2022-12-14 08:26:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-14 08:26:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2022-12-14 08:26:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 93 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2022-12-14 08:26:53,540 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 30 [2022-12-14 08:26:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:26:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2022-12-14 08:26:53,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2022-12-14 08:26:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 08:26:53,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:53,541 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:53,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:26:53,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:26:53,743 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1789385614, now seen corresponding path program 11 times [2022-12-14 08:26:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:26:53,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64837000] [2022-12-14 08:26:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:26:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:26:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:26:53,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:26:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64837000] [2022-12-14 08:26:53,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64837000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:26:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838260524] [2022-12-14 08:26:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:26:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:26:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:26:53,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:26:53,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:26:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:26:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:26:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:26:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:26:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:26:54,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:26:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:26:54,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838260524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:26:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096893417] [2022-12-14 08:26:54,325 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 08:26:54,325 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:26:54,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:26:54,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:26:54,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:26:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,446 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 08:26:54,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 08:26:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,477 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:26:54,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 08:26:54,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,594 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 08:26:54,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 08:26:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 08:26:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:26:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:26:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:26:54,790 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 08:26:54,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 08:26:54,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:26:54,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:26:54,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-12-14 08:26:55,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:26:55,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:26:55,064 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:26:55,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:26:55,121 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:26:55,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:26:55,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:26:55,177 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:26:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:26:55,228 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:26:55,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 08:26:55,259 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 08:26:55,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 08:26:55,306 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 08:26:55,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 08:26:55,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:26:56,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5482#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:26:56,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:26:56,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:26:56,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 08:26:56,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466067751] [2022-12-14 08:26:56,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:26:56,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:26:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:26:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:26:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:26:56,005 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:26:56,467 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2022-12-14 08:26:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 08:26:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 08:26:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:26:56,469 INFO L225 Difference]: With dead ends: 193 [2022-12-14 08:26:56,469 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 08:26:56,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 25 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:26:56,469 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:26:56,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 68 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:26:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 08:26:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2022-12-14 08:26:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.150943396226415) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2022-12-14 08:26:56,543 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 31 [2022-12-14 08:26:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:26:56,544 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2022-12-14 08:26:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2022-12-14 08:26:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 08:26:56,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:26:56,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:26:56,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:26:56,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:26:56,745 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:26:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:26:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash -673588341, now seen corresponding path program 3 times [2022-12-14 08:26:56,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:26:56,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067769433] [2022-12-14 08:26:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:26:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:26:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:27:00,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:00,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067769433] [2022-12-14 08:27:00,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067769433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:27:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280054631] [2022-12-14 08:27:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:27:00,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:27:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:27:00,807 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:27:00,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99b469c-82f4-4ad7-9ad7-00e94b4db290/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:27:00,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:27:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:27:00,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 08:27:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:27:00,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:27:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 08:27:01,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:27:01,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-12-14 08:27:01,761 INFO L321 Elim1Store]: treesize reduction 138, result has 20.7 percent of original size [2022-12-14 08:27:01,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2022-12-14 08:27:01,875 INFO L321 Elim1Store]: treesize reduction 200, result has 15.3 percent of original size [2022-12-14 08:27:01,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 64 treesize of output 72 [2022-12-14 08:27:02,004 INFO L321 Elim1Store]: treesize reduction 228, result has 13.6 percent of original size [2022-12-14 08:27:02,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 76 [2022-12-14 08:27:02,477 INFO L321 Elim1Store]: treesize reduction 415, result has 33.9 percent of original size [2022-12-14 08:27:02,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 85 treesize of output 243 [2022-12-14 08:27:06,210 INFO L321 Elim1Store]: treesize reduction 2009, result has 20.9 percent of original size [2022-12-14 08:27:06,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 454 treesize of output 837